20616464511 has 12 divisors (see below), whose sum is σ = 30074183880. Its totient is φ = 13608226800.

The previous prime is 20616464503. The next prime is 20616464543. The reversal of 20616464511 is 11546461602.

20616464511 is a `hidden beast` number, since 2 + 0 + 6 + 1 + 6 + 4 + 645 + 1 + 1 = 666.

It is not a de Polignac number, because 20616464511 - 2³ = 20616464503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20616464551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11339281 + ... + 11341098.

It is an arithmetic number, because the mean of its divisors is an integer number (2506181990).

Almost surely, 2^20616464511 is an apocalyptic number.

20616464511 is a deficient number, since it is larger than the sum of its proper divisors (9457719369).

20616464511 is a wasteful number, since it uses less digits than its factorization.

20616464511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22680486 (or 22680483 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 20616464511 in words is "twenty billion, six hundred sixteen million, four hundred sixty-four thousand, five hundred eleven".