20388317504 has 28 divisors (see below), whose sum is σ = 40506396000. Its totient is φ = 10181981568.

The previous prime is 20388317497. The next prime is 20388317513. The reversal of 20388317504 is 40571388302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136154 + ... + 243545.

It is an arithmetic number, because the mean of its divisors is an integer number (1446657000).

Almost surely, 2^20388317504 is an apocalyptic number.

It is an amenable number.

20388317504 is a deficient number, since it is larger than the sum of its proper divisors (20118078496).

20388317504 is an equidigital number, since it uses as much as digits as its factorization.

20388317504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380550 (or 380540 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 20388317504 in words is "twenty billion, three hundred eighty-eight million, three hundred seventeen thousand, five hundred four".