20128664304004 has 27 divisors (see below), whose sum is σ = 35345113378743. Its totient is φ = 10030176442728.

The previous prime is 20128664303911. The next prime is 20128664304061. The reversal of 20128664304004 is 40040346682102.

The square root of 20128664304004 is 4486498.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2754706119 + ... + 2754713425.

Almost surely, 2^{20128664304004} is an apocalyptic number.

20128664304004 is the 4486498-th square number.

It is an amenable number.

20128664304004 is a deficient number, since it is larger than the sum of its proper divisors (15216449074739).

20128664304004 is an frugal number, since it uses more digits than its factorization.

20128664304004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15232 (or 7616 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 40.

The spelling of 20128664304004 in words is "twenty trillion, one hundred twenty-eight billion, six hundred sixty-four million, three hundred four thousand, four".