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12103551240 = 2335119169357
BaseRepresentation
bin10110100010110110…
…11000100100001000
31011020111222002221120
423101123120210020
5144242002114430
65321005035240
7605636326254
oct132133304410
934214862846
1012103551240
115151159210
122419555b20
1311ab74c851
1482b695264
154ac8c7610
hex2d16d8908

12103551240 has 64 divisors (see below), whose sum is σ = 39611626560. Its totient is φ = 2934193920.

The previous prime is 12103551203. The next prime is 12103551307. The reversal of 12103551240 is 4215530121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12103551240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4583359 + ... + 4585998.

It is an arithmetic number, because the mean of its divisors is an integer number (618931665).

Almost surely, 212103551240 is an apocalyptic number.

12103551240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12103551240 is an abundant number, since it is smaller than the sum of its proper divisors (27508075320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12103551240 is a wasteful number, since it uses less digits than its factorization.

12103551240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9169382 (or 9169378 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 12103551240 in words is "twelve billion, one hundred three million, five hundred fifty-one thousand, two hundred forty".

Divisors: 1 2 3 4 5 6 8 10 11 12 15 20 22 24 30 33 40 44 55 60 66 88 110 120 132 165 220 264 330 440 660 1320 9169357 18338714 27508071 36677428 45846785 55016142 73354856 91693570 100862927 110032284 137540355 183387140 201725854 220064568 275080710 302588781 366774280 403451708 504314635 550161420 605177562 806903416 1008629270 1100322840 1210355124 1512943905 2017258540 2420710248 3025887810 4034517080 6051775620 12103551240