20315100052566 has 64 divisors (see below), whose sum is σ = 49256488592640. Its totient is φ = 6155120776320.

The previous prime is 20315100052547. The next prime is 20315100052589. The reversal of 20315100052566 is 66525000151302.

20315100052566 is a `hidden beast` number, since 2 + 0 + 31 + 5 + 10 + 0 + 0 + 52 + 566 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20315100052566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1082001 + ... + 6465363.

It is an arithmetic number, because the mean of its divisors is an integer number (769632634260).

Almost surely, 2^{20315100052566} is an apocalyptic number.

20315100052566 is an abundant number, since it is smaller than the sum of its proper divisors (28941388540074).

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

20315100052566 is a wasteful number, since it uses less digits than its factorization.

20315100052566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5389738 (or 5389732 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 20315100052566 in words is "twenty trillion, three hundred fifteen billion, one hundred million, fifty-two thousand, five hundred sixty-six".