20604721504 has 24 divisors (see below), whose sum is σ = 40792179960. Its totient is φ = 10244802816.

The previous prime is 20604721481. The next prime is 20604721549. The reversal of 20604721504 is 40512740602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1792869 + ... + 1804324.

It is an arithmetic number, because the mean of its divisors is an integer number (1699674165).

Almost surely, 2^20604721504 is an apocalyptic number.

It is an amenable number.

20604721504 is a deficient number, since it is larger than the sum of its proper divisors (20187458456).

20604721504 is a wasteful number, since it uses less digits than its factorization.

20604721504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3597382 (or 3597374 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The spelling of 20604721504 in words is "twenty billion, six hundred four million, seven hundred twenty-one thousand, five hundred four".