21703231800 has 96 divisors (see below), whose sum is σ = 74755594800. Its totient is φ = 5787527040.

The previous prime is 21703231727. The next prime is 21703231801. The reversal of 21703231800 is 813230712.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21703231801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2004159 + ... + 2014958.

Almost surely, 2^21703231800 is an apocalyptic number.

21703231800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21703231800 is an abundant number, since it is smaller than the sum of its proper divisors (53052363000).

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

21703231800 is a wasteful number, since it uses less digits than its factorization.

21703231800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4019142 (or 4019127 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

It can be divided in two parts, 217032 and 31800, that added together give a 5-th power (248832 = 12⁵).

The spelling of 21703231800 in words is "twenty-one billion, seven hundred three million, two hundred thirty-one thousand, eight hundred".