20577304518 has 32 divisors (see below), whose sum is σ = 41471364480. Its totient is φ = 6806358720.

The previous prime is 20577304487. The next prime is 20577304547. The reversal of 20577304518 is 81540377502.

It is a super-2 number, since 2×20577304518² (a number of 21 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 20577304518.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2097621 + ... + 2107407.

It is an arithmetic number, because the mean of its divisors is an integer number (1295980140).

Almost surely, 2^20577304518 is an apocalyptic number.

20577304518 is an abundant number, since it is smaller than the sum of its proper divisors (20894059962).

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

20577304518 is a wasteful number, since it uses less digits than its factorization.

20577304518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12452.

The product of its (nonzero) digits is 235200, while the sum is 42.

The spelling of 20577304518 in words is "twenty billion, five hundred seventy-seven million, three hundred four thousand, five hundred eighteen".