20512212022564 has 24 divisors (see below), whose sum is σ = 36404118370368. Its totient is φ = 10111052525280.

The previous prime is 20512212022543. The next prime is 20512212022619. The reversal of 20512212022564 is 46522021221502.

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, 2655754 + ... + 6933790.

It is an arithmetic number, because the mean of its divisors is an integer number (1516838265432).

Almost surely, 2^{20512212022564} is an apocalyptic number.

It is an amenable number.

20512212022564 is a deficient number, since it is larger than the sum of its proper divisors (15891906347804).

20512212022564 is a wasteful number, since it uses less digits than its factorization.

20512212022564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4294995 (or 4294993 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 20512212022564 in words is "twenty trillion, five hundred twelve billion, two hundred twelve million, twenty-two thousand, five hundred sixty-four".