20368935765 has 24 divisors (see below), whose sum is σ = 35348302080. Its totient is φ = 10850464224.

The previous prime is 20368935757. The next prime is 20368935799. The reversal of 20368935765 is 56753986302.

It is a happy number.

20368935765 is a `hidden beast` number, since 2 + 0 + 3 + 68 + 9 + 3 + 576 + 5 = 666.

It is not a de Polignac number, because 20368935765 - 2³ = 20368935757 is a prime.

It is a super-2 number, since 2×20368935765² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231997 + ... + 307506.

It is an arithmetic number, because the mean of its divisors is an integer number (1472845920).

Almost surely, 2^20368935765 is an apocalyptic number.

It is an amenable number.

20368935765 is a deficient number, since it is larger than the sum of its proper divisors (14979366315).

20368935765 is a wasteful number, since it uses less digits than its factorization.

20368935765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540353 (or 540350 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 54.

The spelling of 20368935765 in words is "twenty billion, three hundred sixty-eight million, nine hundred thirty-five thousand, seven hundred sixty-five".