20013123677634 has 24 divisors (see below), whose sum is σ = 43361889833340. Its totient is φ = 6671022477408.

The previous prime is 20013123677611. The next prime is 20013123677671. The reversal of 20013123677634 is 43677632131002.

20013123677634 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 3 + 1 + 2 + 3 + 6 + 7 + 7 + 634 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18411848555409 + 1601275122225 = 4290903^2 + 1265415^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20013123677634.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6012952 + ... + 8728220.

Almost surely, 2^{20013123677634} is an apocalyptic number.

20013123677634 is an abundant number, since it is smaller than the sum of its proper divisors (23348766155706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20013123677634 is a wasteful number, since it uses less digits than its factorization.

20013123677634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124754 (or 3124751 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 45.

The spelling of 20013123677634 in words is "twenty trillion, thirteen billion, one hundred twenty-three million, six hundred seventy-seven thousand, six hundred thirty-four".