21992830776 has 128 divisors (see below), whose sum is σ = 73925568000. Its totient is φ = 5914031616.

The previous prime is 21992830757. The next prime is 21992830799. The reversal of 21992830776 is 67703829912.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 402106 + ... + 453513.

It is an arithmetic number, because the mean of its divisors is an integer number (577543500).

Almost surely, 2^21992830776 is an apocalyptic number.

It is an amenable number.

21992830776 is an abundant number, since it is smaller than the sum of its proper divisors (51932737224).

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

21992830776 is a wasteful number, since it uses less digits than its factorization.

21992830776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855658 (or 855648 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The spelling of 21992830776 in words is "twenty-one billion, nine hundred ninety-two million, eight hundred thirty thousand, seven hundred seventy-six".