21613246504 has 16 divisors (see below), whose sum is σ = 40596066900. Its totient is φ = 10787628672.

The previous prime is 21613246493. The next prime is 21613246507. The reversal of 21613246504 is 40564231612.

It can be written as a sum of positive squares in 2 ways, for example, as 20706634404 + 906612100 = 143898^2 + 30110^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21613246504.

It is not an unprimeable number, because it can be changed into a prime (21613246507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2369487 + ... + 2378590.

Almost surely, 2^21613246504 is an apocalyptic number.

It is an amenable number.

21613246504 is a deficient number, since it is larger than the sum of its proper divisors (18982820396).

21613246504 is a wasteful number, since it uses less digits than its factorization.

21613246504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4748652 (or 4748648 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 21613246504 in words is "twenty-one billion, six hundred thirteen million, two hundred forty-six thousand, five hundred four".