20386577564 has 24 divisors (see below), whose sum is σ = 35979164928. Its totient is φ = 10107108720.

The previous prime is 20386577521. The next prime is 20386577623. The reversal of 20386577564 is 46577568302.

It is a happy number.

It is a super-2 number, since 2×20386577564² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244739 + ... + 317285.

It is an arithmetic number, because the mean of its divisors is an integer number (1499131872).

Almost surely, 2^20386577564 is an apocalyptic number.

It is an amenable number.

20386577564 is a deficient number, since it is larger than the sum of its proper divisors (15592587364).

20386577564 is a wasteful number, since it uses less digits than its factorization.

20386577564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73145 (or 73143 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 53.

The spelling of 20386577564 in words is "twenty billion, three hundred eighty-six million, five hundred seventy-seven thousand, five hundred sixty-four".