21796402992 has 80 divisors (see below), whose sum is σ = 69301397760. Its totient is φ = 5748500736.

The previous prime is 21796402907. The next prime is 21796402997. The reversal of 21796402992 is 29920469712.

It is not an unprimeable number, because it can be changed into a prime (21796402997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2490642 + ... + 2499377.

It is an arithmetic number, because the mean of its divisors is an integer number (866267472).

Almost surely, 2^21796402992 is an apocalyptic number.

It is an amenable number.

21796402992 is an abundant number, since it is smaller than the sum of its proper divisors (47504994768).

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

21796402992 is a wasteful number, since it uses less digits than its factorization.

21796402992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4990050 (or 4990044 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The spelling of 21796402992 in words is "twenty-one billion, seven hundred ninety-six million, four hundred two thousand, nine hundred ninety-two".