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20120201100 = 22325222355779
BaseRepresentation
bin10010101111010000…
…011110011110001100
31220221012201010011100
4102233100132132030
5312201232413400
613124301423100
71311411613266
oct225720363614
956835633140
1020120201100
11859536897a
123a9626aa90
131b8857224c
14d8c254b36
157cb5b1100
hex4af41e78c

20120201100 has 54 divisors (see below), whose sum is σ = 63065655380. Its totient is φ = 5365386720.

The previous prime is 20120201081. The next prime is 20120201137. The reversal of 20120201100 is 110202102.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11176990 + ... + 11178789.

Almost surely, 220120201100 is an apocalyptic number.

20120201100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120201100 is an abundant number, since it is smaller than the sum of its proper divisors (42945454280).

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

20120201100 is a wasteful number, since it uses less digits than its factorization.

20120201100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22355799 (or 22355789 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20120201100 its reverse (110202102), we get a palindrome (20230403202).

The spelling of 20120201100 in words is "twenty billion, one hundred twenty million, two hundred one thousand, one hundred".

Divisors: 1 2 3 4 5 6 9 10 12 15 18 20 25 30 36 45 50 60 75 90 100 150 180 225 300 450 900 22355779 44711558 67067337 89423116 111778895 134134674 201202011 223557790 268269348 335336685 402404022 447115580 558894475 670673370 804808044 1006010055 1117788950 1341346740 1676683425 2012020110 2235577900 3353366850 4024040220 5030050275 6706733700 10060100550 20120201100