20125536644004 has 144 divisors (see below), whose sum is σ = 55598392872960. Its totient is φ = 5645311531200.

The previous prime is 20125536643967. The next prime is 20125536644063. The reversal of 20125536644004 is 40044663552102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8684614 + ... + 10755165.

Almost surely, 2^{20125536644004} is an apocalyptic number.

It is an amenable number.

20125536644004 is an abundant number, since it is smaller than the sum of its proper divisors (35472856228956).

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

20125536644004 is a wasteful number, since it uses less digits than its factorization.

20125536644004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19439862 (or 19439849 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 20125536644004 in words is "twenty trillion, one hundred twenty-five billion, five hundred thirty-six million, six hundred forty-four thousand, four".