20570253156 has 48 divisors (see below), whose sum is σ = 54771655680. Its totient is φ = 6671432160.

The previous prime is 20570253127. The next prime is 20570253163. The reversal of 20570253156 is 65135207502.

20570253156 is a `hidden beast` number, since 2 + 0 + 5 + 70 + 2 + 531 + 56 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20570253156.

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, 2569860 + ... + 2577851.

It is an arithmetic number, because the mean of its divisors is an integer number (1141076160).

Almost surely, 2^20570253156 is an apocalyptic number.

It is an amenable number.

20570253156 is an abundant number, since it is smaller than the sum of its proper divisors (34201402524).

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

20570253156 is a wasteful number, since it uses less digits than its factorization.

20570253156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5147761 (or 5147753 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The spelling of 20570253156 in words is "twenty billion, five hundred seventy million, two hundred fifty-three thousand, one hundred fifty-six".