20013123677764 has 12 divisors (see below), whose sum is σ = 40026247355584. Its totient is φ = 8577053004744.

The previous prime is 20013123677741. The next prime is 20013123677779. The reversal of 20013123677764 is 46777632131002.

It is a happy number.

20013123677764 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 357377208504 + ... + 357377208559.

Almost surely, 2^{20013123677764} is an apocalyptic number.

It is an amenable number.

20013123677764 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20013123677764 is a wasteful number, since it uses less digits than its factorization.

20013123677764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714754417074 (or 714754417072 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 49.

The spelling of 20013123677764 in words is "twenty trillion, thirteen billion, one hundred twenty-three million, six hundred seventy-seven thousand, seven hundred sixty-four".