21330875624 has 32 divisors (see below), whose sum is σ = 41086432200. Its totient is φ = 10374635520.

The previous prime is 21330875617. The next prime is 21330875639. The reversal of 21330875624 is 42657803312.

It can be written as a sum of positive squares in 4 ways, for example, as 18498720100 + 2832155524 = 136010^2 + 53218^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1877192 + ... + 1888520.

Almost surely, 2^21330875624 is an apocalyptic number.

It is an amenable number.

21330875624 is a deficient number, since it is larger than the sum of its proper divisors (19755556576).

21330875624 is a wasteful number, since it uses less digits than its factorization.

21330875624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17733 (or 17729 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 21330875624 in words is "twenty-one billion, three hundred thirty million, eight hundred seventy-five thousand, six hundred twenty-four".