21425374364 has 24 divisors (see below), whose sum is σ = 38528825328. Its totient is φ = 10417455360.

The previous prime is 21425374349. The next prime is 21425374381. The reversal of 21425374364 is 46347352412.

It is a congruent number.

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, 238559 + ... + 315849.

It is an arithmetic number, because the mean of its divisors is an integer number (1605367722).

Almost surely, 2^21425374364 is an apocalyptic number.

It is an amenable number.

21425374364 is a deficient number, since it is larger than the sum of its proper divisors (17103450964).

21425374364 is a wasteful number, since it uses less digits than its factorization.

21425374364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79205 (or 79203 counting only the distinct ones).

The product of its digits is 483840, while the sum is 41.

The spelling of 21425374364 in words is "twenty-one billion, four hundred twenty-five million, three hundred seventy-four thousand, three hundred sixty-four".