20533256636610 has 32 divisors (see below), whose sum is σ = 50869487411712. Its totient is φ = 5298904938240.

The previous prime is 20533256636609. The next prime is 20533256636749. The reversal of 20533256636610 is 1663665233502.

It is a happy number.

It is a super-2 number, since 2×20533256636610² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20533256636610.

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, 11039384359 + ... + 11039386218.

It is an arithmetic number, because the mean of its divisors is an integer number (1589671481616).

Almost surely, 2^{20533256636610} is an apocalyptic number.

20533256636610 is an abundant number, since it is smaller than the sum of its proper divisors (30336230775102).

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

20533256636610 is a wasteful number, since it uses less digits than its factorization.

20533256636610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22078770618.

The product of its (nonzero) digits is 3499200, while the sum is 48.

The spelling of 20533256636610 in words is "twenty trillion, five hundred thirty-three billion, two hundred fifty-six million, six hundred thirty-six thousand, six hundred ten".