21375133203524 has 24 divisors (see below), whose sum is σ = 37693806091200. Its totient is φ = 10605548653920.

The previous prime is 21375133203493. The next prime is 21375133203587. The reversal of 21375133203524 is 42530233157312.

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, 8140232 + ... + 10440959.

It is an arithmetic number, because the mean of its divisors is an integer number (1570575253800).

Almost surely, 2^{21375133203524} is an apocalyptic number.

It is an amenable number.

21375133203524 is a deficient number, since it is larger than the sum of its proper divisors (16318672887676).

21375133203524 is a wasteful number, since it uses less digits than its factorization.

21375133203524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18583403 (or 18583401 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 41.

The spelling of 21375133203524 in words is "twenty-one trillion, three hundred seventy-five billion, one hundred thirty-three million, two hundred three thousand, five hundred twenty-four".