21796865474160 has 160 divisors (see below), whose sum is σ = 78680222000640. Its totient is φ = 4888138005504.

The previous prime is 21796865474123. The next prime is 21796865474173. The reversal of 21796865474160 is 6147456869712.

It is a junction number, because it is equal to n+sod(n) for n = 21796865474091 and 21796865474100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122310250 + ... + 122488329.

It is an arithmetic number, because the mean of its divisors is an integer number (491751387504).

Almost surely, 2^{21796865474160} is an apocalyptic number.

21796865474160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21796865474160 is an abundant number, since it is smaller than the sum of its proper divisors (56883356526480).

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

21796865474160 is a wasteful number, since it uses less digits than its factorization.

21796865474160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244798655 (or 244798649 counting only the distinct ones).

The product of its (nonzero) digits is 121927680, while the sum is 66.

The spelling of 21796865474160 in words is "twenty-one trillion, seven hundred ninety-six billion, eight hundred sixty-five million, four hundred seventy-four thousand, one hundred sixty".