20686704478133 has 16 divisors (see below), whose sum is σ = 21719225545920. Its totient is φ = 19676825946624.

The previous prime is 20686704478087. The next prime is 20686704478177. The reversal of 20686704478133 is 33187440768602.

It is not a de Polignac number, because 20686704478133 - 2²² = 20686700283829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20686704478733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11323691 + ... + 13023032.

It is an arithmetic number, because the mean of its divisors is an integer number (1357451596620).

Almost surely, 2^{20686704478133} is an apocalyptic number.

It is an amenable number.

20686704478133 is a deficient number, since it is larger than the sum of its proper divisors (1032521067787).

20686704478133 is a wasteful number, since it uses less digits than its factorization.

20686704478133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24347188.

The product of its (nonzero) digits is 32514048, while the sum is 59.

The spelling of 20686704478133 in words is "twenty trillion, six hundred eighty-six billion, seven hundred four million, four hundred seventy-eight thousand, one hundred thirty-three".