20236912065 has 48 divisors (see below), whose sum is σ = 38114618880. Its totient is φ = 9895115520.

The previous prime is 20236912063. The next prime is 20236912099. The reversal of 20236912065 is 56021963202.

It is not a de Polignac number, because 20236912065 - 2¹ = 20236912063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20236912063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 355252 + ... + 408261.

It is an arithmetic number, because the mean of its divisors is an integer number (794054560).

Almost surely, 2^20236912065 is an apocalyptic number.

It is an amenable number.

20236912065 is a deficient number, since it is larger than the sum of its proper divisors (17877706815).

20236912065 is a wasteful number, since it uses less digits than its factorization.

20236912065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763574 (or 763571 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 20236912065 in words is "twenty billion, two hundred thirty-six million, nine hundred twelve thousand, sixty-five".