20946836735 has 32 divisors (see below), whose sum is σ = 28485103680. Its totient is φ = 14647449600.

The previous prime is 20946836731. The next prime is 20946836797. The reversal of 20946836735 is 53763864902.

It is a happy number.

It is not a de Polignac number, because 20946836735 - 2² = 20946836731 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20946836731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 357149 + ... + 411641.

It is an arithmetic number, because the mean of its divisors is an integer number (890159490).

Almost surely, 2^20946836735 is an apocalyptic number.

20946836735 is a deficient number, since it is larger than the sum of its proper divisors (7538266945).

20946836735 is a wasteful number, since it uses less digits than its factorization.

20946836735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54779.

The product of its (nonzero) digits is 6531840, while the sum is 53.

The spelling of 20946836735 in words is "twenty billion, nine hundred forty-six million, eight hundred thirty-six thousand, seven hundred thirty-five".