21752536083604 has 24 divisors (see below), whose sum is σ = 38129269697960. Its totient is φ = 10858468110336.

The previous prime is 21752536083599. The next prime is 21752536083703. The reversal of 21752536083604 is 40638063525712.

It can be written as a sum of positive squares in 4 ways, for example, as 8855445156100 + 12897090927504 = 2975810^2 + 3591252^2 .

It is a congruent number.

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, 8462284 + ... + 10729180.

Almost surely, 2^{21752536083604} is an apocalyptic number.

It is an amenable number.

21752536083604 is a deficient number, since it is larger than the sum of its proper divisors (16376733614356).

21752536083604 is a wasteful number, since it uses less digits than its factorization.

21752536083604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270827 (or 2270825 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 52.

The spelling of 21752536083604 in words is "twenty-one trillion, seven hundred fifty-two billion, five hundred thirty-six million, eighty-three thousand, six hundred four".