21753830140 has 48 divisors (see below), whose sum is σ = 52559640000. Its totient is φ = 7408392192.

The previous prime is 21753830099. The next prime is 21753830201. The reversal of 21753830140 is 4103835712.

It is a junction number, because it is equal to n+sod(n) for n = 21753830096 and 21753830105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500565 + ... + 542284.

It is an arithmetic number, because the mean of its divisors is an integer number (1094992500).

Almost surely, 2^21753830140 is an apocalyptic number.

21753830140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21753830140 is an abundant number, since it is smaller than the sum of its proper divisors (30805809860).

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

21753830140 is a wasteful number, since it uses less digits than its factorization.

21753830140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043014 (or 1043012 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 21753830140 in words is "twenty-one billion, seven hundred fifty-three million, eight hundred thirty thousand, one hundred forty".