21167410992 has 80 divisors (see below), whose sum is σ = 67301525760. Its totient is φ = 5582612736.

The previous prime is 21167410987. The next prime is 21167411033. The reversal of 21167410992 is 29901476112.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 2418642 + ... + 2427377.

It is an arithmetic number, because the mean of its divisors is an integer number (841269072).

Almost surely, 2^21167410992 is an apocalyptic number.

It is an amenable number.

21167410992 is an abundant number, since it is smaller than the sum of its proper divisors (46134114768).

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

21167410992 is a wasteful number, since it uses less digits than its factorization.

21167410992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4846050 (or 4846044 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The spelling of 21167410992 in words is "twenty-one billion, one hundred sixty-seven million, four hundred ten thousand, nine hundred ninety-two".