20925936964 has 27 divisors (see below), whose sum is σ = 36941636991. Its totient is φ = 10371978600.

The previous prime is 20925936937. The next prime is 20925937013. The reversal of 20925936964 is 46963952902.

The square root of 20925936964 is 144658.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 43686477 + ... + 43686955.

Almost surely, 2^20925936964 is an apocalyptic number.

20925936964 is the 144658-th square number.

It is an amenable number.

20925936964 is a deficient number, since it is larger than the sum of its proper divisors (16015700027).

20925936964 is an frugal number, since it uses more digits than its factorization.

20925936964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 6298560, while the sum is 55.

The spelling of 20925936964 in words is "twenty billion, nine hundred twenty-five million, nine hundred thirty-six thousand, nine hundred sixty-four".