20520666252 has 48 divisors (see below), whose sum is σ = 53554099200. Its totient is φ = 6794917200.

The previous prime is 20520666239. The next prime is 20520666319. The reversal of 20520666252 is 25266602502.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 612852 + ... + 645467.

It is an arithmetic number, because the mean of its divisors is an integer number (1115710400).

Almost surely, 2^20520666252 is an apocalyptic number.

It is an amenable number.

20520666252 is an abundant number, since it is smaller than the sum of its proper divisors (33033432948).

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

20520666252 is a wasteful number, since it uses less digits than its factorization.

20520666252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258483 (or 1258475 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 20520666252 in words is "twenty billion, five hundred twenty million, six hundred sixty-six thousand, two hundred fifty-two".