20942574757 has 16 divisors (see below), whose sum is σ = 22992480000. Its totient is φ = 18958665024.

The previous prime is 20942574727. The next prime is 20942574769. The reversal of 20942574757 is 75747524902.

It is not a de Polignac number, because 20942574757 - 2²⁷ = 20808357029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20942574727) 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, 84594 + ... + 221452.

It is an arithmetic number, because the mean of its divisors is an integer number (1437030000).

Almost surely, 2^20942574757 is an apocalyptic number.

It is an amenable number.

20942574757 is a deficient number, since it is larger than the sum of its proper divisors (2049905243).

20942574757 is a wasteful number, since it uses less digits than its factorization.

20942574757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137100.

The product of its (nonzero) digits is 4939200, while the sum is 52.

The spelling of 20942574757 in words is "twenty billion, nine hundred forty-two million, five hundred seventy-four thousand, seven hundred fifty-seven".