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20955376040 = 2354211244381
BaseRepresentation
bin10011100001000010…
…011010100110101000
32000002102020101210112
4103201002122212220
5320404034013130
613343214233452
71341202520534
oct234102324650
960072211715
1020955376040
1189838441a5
124089ab5888
131c8c5bc6c1
14102b138bc4
15829a85495
hex4e109a9a8

20955376040 has 32 divisors (see below), whose sum is σ = 47261628360. Its totient is φ = 8362233600.

The previous prime is 20955376037. The next prime is 20955376049. The reversal of 20955376040 is 4067355902.

It can be written as a sum of positive squares in 4 ways, for example, as 16830910756 + 4124465284 = 129734^2 + 64222^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20955376049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 605351 + ... + 639030.

Almost surely, 220955376040 is an apocalyptic number.

20955376040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20955376040 is an abundant number, since it is smaller than the sum of its proper divisors (26306252320).

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

20955376040 is a wasteful number, since it uses less digits than its factorization.

20955376040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244813 (or 1244809 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 41.

The spelling of 20955376040 in words is "twenty billion, nine hundred fifty-five million, three hundred seventy-six thousand, forty".

Divisors: 1 2 4 5 8 10 20 40 421 842 1684 2105 3368 4210 8420 16840 1244381 2488762 4977524 6221905 9955048 12443810 24887620 49775240 523884401 1047768802 2095537604 2619422005 4191075208 5238844010 10477688020 20955376040