20754738117 has 12 divisors (see below), whose sum is σ = 29981296800. Its totient is φ = 13835462568.

The previous prime is 20754738101. The next prime is 20754738139. The reversal of 20754738117 is 71183745702.

20754738117 is a `hidden beast` number, since 20 + 7 + 547 + 3 + 81 + 1 + 7 = 666.

It is not a de Polignac number, because 20754738117 - 2⁴ = 20754738101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20754738517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53848 + ... + 210734.

It is an arithmetic number, because the mean of its divisors is an integer number (2498441400).

Almost surely, 2^20754738117 is an apocalyptic number.

It is an amenable number.

20754738117 is a deficient number, since it is larger than the sum of its proper divisors (9226558683).

20754738117 is a wasteful number, since it uses less digits than its factorization.

20754738117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171592 (or 171589 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The spelling of 20754738117 in words is "twenty billion, seven hundred fifty-four million, seven hundred thirty-eight thousand, one hundred seventeen".