21976492008 has 32 divisors (see below), whose sum is σ = 58173068160. Its totient is φ = 6894585600.

The previous prime is 21976492003. The next prime is 21976492033. The reversal of 21976492008 is 80029467912.

It is not an unprimeable number, because it can be changed into a prime (21976492003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26931568 + ... + 26932383.

It is an arithmetic number, because the mean of its divisors is an integer number (1817908380).

Almost surely, 2^21976492008 is an apocalyptic number.

It is an amenable number.

21976492008 is an abundant number, since it is smaller than the sum of its proper divisors (36196576152).

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

21976492008 is a wasteful number, since it uses less digits than its factorization.

21976492008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53863977 (or 53863973 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 21976492008 in words is "twenty-one billion, nine hundred seventy-six million, four hundred ninety-two thousand, eight".