21431024008 has 32 divisors (see below), whose sum is σ = 42693415200. Its totient is φ = 10056655872.

The previous prime is 21431024003. The next prime is 21431024009. The reversal of 21431024008 is 80042013412.

It is not an unprimeable number, because it can be changed into a prime (21431024003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 642585 + ... + 675112.

It is an arithmetic number, because the mean of its divisors is an integer number (1334169225).

Almost surely, 2^21431024008 is an apocalyptic number.

It is an amenable number.

21431024008 is a deficient number, since it is larger than the sum of its proper divisors (21262391192).

21431024008 is a wasteful number, since it uses less digits than its factorization.

21431024008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317829 (or 1317825 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The spelling of 21431024008 in words is "twenty-one billion, four hundred thirty-one million, twenty-four thousand, eight".