20531300500 has 48 divisors (see below), whose sum is σ = 44862801984. Its totient is φ = 8208410400.

The previous prime is 20531300477. The next prime is 20531300501. The reversal of 20531300500 is 500313502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20531300501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1112347 + ... + 1130653.

It is an arithmetic number, because the mean of its divisors is an integer number (934641708).

Almost surely, 2^20531300500 is an apocalyptic number.

20531300500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20531300500 is an abundant number, since it is smaller than the sum of its proper divisors (24331501484).

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

20531300500 is a wasteful number, since it uses less digits than its factorization.

20531300500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20569 (or 20557 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 19.

The spelling of 20531300500 in words is "twenty billion, five hundred thirty-one million, three hundred thousand, five hundred".