21425792772 has 24 divisors (see below), whose sum is σ = 50024865856. Its totient is φ = 7137452448.

The previous prime is 21425792747. The next prime is 21425792821. The reversal of 21425792772 is 27729752412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539848 + ... + 578175.

Almost surely, 2^21425792772 is an apocalyptic number.

It is an amenable number.

21425792772 is an abundant number, since it is smaller than the sum of its proper divisors (28599073084).

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

21425792772 is a wasteful number, since it uses less digits than its factorization.

21425792772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119627 (or 1119625 counting only the distinct ones).

The product of its digits is 987840, while the sum is 48.

The spelling of 21425792772 in words is "twenty-one billion, four hundred twenty-five million, seven hundred ninety-two thousand, seven hundred seventy-two".