20537057774731 has 16 divisors (see below), whose sum is σ = 22253006405664. Its totient is φ = 18880754174464.

The previous prime is 20537057774711. The next prime is 20537057774777. The reversal of 20537057774731 is 13747775073502.

It is a cyclic number.

It is not a de Polignac number, because 20537057774731 - 2⁵ = 20537057774699 is a prime.

It is a super-2 number, since 2×20537057774731² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20537057774711) 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, 50001700 + ... + 50410753.

It is an arithmetic number, because the mean of its divisors is an integer number (1390812900354).

Almost surely, 2^{20537057774731} is an apocalyptic number.

20537057774731 is a deficient number, since it is larger than the sum of its proper divisors (1715948630933).

20537057774731 is a wasteful number, since it uses less digits than its factorization.

20537057774731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100412750.

The product of its (nonzero) digits is 30252600, while the sum is 58.

The spelling of 20537057774731 in words is "twenty trillion, five hundred thirty-seven billion, fifty-seven million, seven hundred seventy-four thousand, seven hundred thirty-one".