20623317500 has 30 divisors (see below), whose sum is σ = 45099076176. Its totient is φ = 8249326000.

The previous prime is 20623317487. The next prime is 20623317511. The reversal of 20623317500 is 571332602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4122164 + ... + 4127163.

Almost surely, 2^20623317500 is an apocalyptic number.

20623317500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20623317500 is an abundant number, since it is smaller than the sum of its proper divisors (24475758676).

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

20623317500 is an equidigital number, since it uses as much as digits as its factorization.

20623317500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8249351 (or 8249334 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 29.

The spelling of 20623317500 in words is "twenty billion, six hundred twenty-three million, three hundred seventeen thousand, five hundred".