20936695461 has 24 divisors (see below), whose sum is σ = 32018185920. Its totient is φ = 12137209920.

The previous prime is 20936695459. The next prime is 20936695489. The reversal of 20936695461 is 16459663902.

It is not a de Polignac number, because 20936695461 - 2¹ = 20936695459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20936695411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1245496 + ... + 1262193.

It is an arithmetic number, because the mean of its divisors is an integer number (1334091080).

Almost surely, 2^20936695461 is an apocalyptic number.

It is an amenable number.

20936695461 is a deficient number, since it is larger than the sum of its proper divisors (11081490459).

20936695461 is a wasteful number, since it uses less digits than its factorization.

20936695461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507737 (or 2507726 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 51.

The spelling of 20936695461 in words is "twenty billion, nine hundred thirty-six million, six hundred ninety-five thousand, four hundred sixty-one".