21856850053900 has 36 divisors (see below), whose sum is σ = 47431827684360. Its totient is φ = 8742286000000.

The previous prime is 21856850053877. The next prime is 21856850053931. The reversal of 21856850053900 is 935005865812.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3736726 + ... + 7594525.

It is an arithmetic number, because the mean of its divisors is an integer number (1317550769010).

Almost surely, 2^{21856850053900} is an apocalyptic number.

21856850053900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21856850053900 is an abundant number, since it is smaller than the sum of its proper divisors (25574977630460).

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

21856850053900 is a wasteful number, since it uses less digits than its factorization.

21856850053900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11350554 (or 11350547 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 52.

The spelling of 21856850053900 in words is "twenty-one trillion, eight hundred fifty-six billion, eight hundred fifty million, fifty-three thousand, nine hundred".