20311764655 has 64 divisors (see below), whose sum is σ = 31978598400. Its totient is φ = 12025428480.

The previous prime is 20311764637. The next prime is 20311764659. The reversal of 20311764655 is 55646711302.

It is not a de Polignac number, because 20311764655 - 2⁷ = 20311764527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311764659) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 668085 + ... + 697825.

It is an arithmetic number, because the mean of its divisors is an integer number (499665600).

Almost surely, 2^20311764655 is an apocalyptic number.

20311764655 is a deficient number, since it is larger than the sum of its proper divisors (11666833745).

20311764655 is a wasteful number, since it uses less digits than its factorization.

20311764655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29864.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 20311764655 in words is "twenty billion, three hundred eleven million, seven hundred sixty-four thousand, six hundred fifty-five".