21513535334504 has 16 divisors (see below), whose sum is σ = 40337933812800. Its totient is φ = 10756752984432.

The previous prime is 21513535334479. The next prime is 21513535334509. The reversal of 21513535334504 is 40543353531512.

It is not an unprimeable number, because it can be changed into a prime (21513535334509) 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, 6759329 + ... + 9418895.

It is an arithmetic number, because the mean of its divisors is an integer number (2521120863300).

Almost surely, 2^{21513535334504} is an apocalyptic number.

It is an amenable number.

21513535334504 is a deficient number, since it is larger than the sum of its proper divisors (18824398478296).

21513535334504 is a wasteful number, since it uses less digits than its factorization.

21513535334504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670712 (or 3670708 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 44.

The spelling of 21513535334504 in words is "twenty-one trillion, five hundred thirteen billion, five hundred thirty-five million, three hundred thirty-four thousand, five hundred four".