21934092168 has 64 divisors (see below), whose sum is σ = 61762708800. Its totient is φ = 7211203200.

The previous prime is 21934092151. The next prime is 21934092197. The reversal of 21934092168 is 86129043912.

21934092168 is a `hidden beast` number, since 21 + 9 + 3 + 409 + 216 + 8 = 666.

It is a super-2 number, since 2×21934092168² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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, 679758 + ... + 711293.

It is an arithmetic number, because the mean of its divisors is an integer number (965042325).

Almost surely, 2^21934092168 is an apocalyptic number.

It is an amenable number.

21934092168 is an abundant number, since it is smaller than the sum of its proper divisors (39828616632).

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

21934092168 is a wasteful number, since it uses less digits than its factorization.

21934092168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391139 (or 1391129 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 21934092168 in words is "twenty-one billion, nine hundred thirty-four million, ninety-two thousand, one hundred sixty-eight".