20577533690 has 64 divisors (see below), whose sum is σ = 42947712000. Its totient is φ = 6952697856.

The previous prime is 20577533689. The next prime is 20577533701. The reversal of 20577533690 is 9633577502.

It is a super-2 number, since 2×20577533690² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3187586 + ... + 3194034.

It is an arithmetic number, because the mean of its divisors is an integer number (671058000).

Almost surely, 2^20577533690 is an apocalyptic number.

20577533690 is an abundant number, since it is smaller than the sum of its proper divisors (22370178310).

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

20577533690 is a wasteful number, since it uses less digits than its factorization.

20577533690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7119.

The product of its (nonzero) digits is 1190700, while the sum is 47.

The spelling of 20577533690 in words is "twenty billion, five hundred seventy-seven million, five hundred thirty-three thousand, six hundred ninety".