20577698863 has 16 divisors (see below), whose sum is σ = 21101414400. Its totient is φ = 20060543520.

The previous prime is 20577698849. The next prime is 20577698873. The reversal of 20577698863 is 36889677502.

It is a cyclic number.

It is not a de Polignac number, because 20577698863 - 2¹³ = 20577690671 is a prime.

It is a super-2 number, since 2×20577698863² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20577698833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3550498 + ... + 3556288.

It is an arithmetic number, because the mean of its divisors is an integer number (1318838400).

Almost surely, 2^20577698863 is an apocalyptic number.

20577698863 is a deficient number, since it is larger than the sum of its proper divisors (523715537).

20577698863 is a wasteful number, since it uses less digits than its factorization.

20577698863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6342.

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 20577698863 in words is "twenty billion, five hundred seventy-seven million, six hundred ninety-eight thousand, eight hundred sixty-three".