21612530760752 has 20 divisors (see below), whose sum is σ = 42765220442976. Its totient is φ = 10576344840000.

The previous prime is 21612530760721. The next prime is 21612530760811. The reversal of 21612530760752 is 25706703521612.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a junction number, because it is equal to n+sod(n) for n = 21612530760697 and 21612530760706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14370032999 + ... + 14370034502.

Almost surely, 2^{21612530760752} is an apocalyptic number.

It is an amenable number.

21612530760752 is a deficient number, since it is larger than the sum of its proper divisors (21152689682224).

21612530760752 is a wasteful number, since it uses less digits than its factorization.

21612530760752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28740067556 (or 28740067550 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 21612530760752 in words is "twenty-one trillion, six hundred twelve billion, five hundred thirty million, seven hundred sixty thousand, seven hundred fifty-two".