20939955163065 has 48 divisors (see below), whose sum is σ = 37656945570816. Its totient is φ = 10752857136000.

The previous prime is 20939955163037. The next prime is 20939955163103. The reversal of 20939955163065 is 56036155993902.

20939955163065 is a `hidden beast` number, since 20 + 9 + 3 + 9 + 9 + 5 + 516 + 30 + 65 = 666.

It is not a de Polignac number, because 20939955163065 - 2¹⁰ = 20939955162041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20939955162993 and 20939955163011.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37823461 + ... + 38373090.

It is an arithmetic number, because the mean of its divisors is an integer number (784519699392).

Almost surely, 2^{20939955163065} is an apocalyptic number.

It is an amenable number.

20939955163065 is a deficient number, since it is larger than the sum of its proper divisors (16716990407751).

20939955163065 is a wasteful number, since it uses less digits than its factorization.

20939955163065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76196790 (or 76196787 counting only the distinct ones).

The product of its (nonzero) digits is 59049000, while the sum is 63.

The spelling of 20939955163065 in words is "twenty trillion, nine hundred thirty-nine billion, nine hundred fifty-five million, one hundred sixty-three thousand, sixty-five".