21660546435052 has 12 divisors (see below), whose sum is σ = 43321092870160. Its totient is φ = 9283091329296.

The previous prime is 21660546435001. The next prime is 21660546435089. The reversal of 21660546435052 is 25053464506612.

21660546435052 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21660546434987 and 21660546435005.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386795472027 + ... + 386795472082.

Almost surely, 2^{21660546435052} is an apocalyptic number.

It is an amenable number.

21660546435052 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21660546435052 is a wasteful number, since it uses less digits than its factorization.

21660546435052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773590944120 (or 773590944118 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 49.

The spelling of 21660546435052 in words is "twenty-one trillion, six hundred sixty billion, five hundred forty-six million, four hundred thirty-five thousand, fifty-two".