21807616260 has 24 divisors (see below), whose sum is σ = 61061325696. Its totient is φ = 5815364320.

The previous prime is 21807616253. The next prime is 21807616261. The reversal of 21807616260 is 6261670812.

It is not an unprimeable number, because it can be changed into a prime (21807616261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181730076 + ... + 181730195.

It is an arithmetic number, because the mean of its divisors is an integer number (2544221904).

Almost surely, 2^21807616260 is an apocalyptic number.

21807616260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21807616260 is an abundant number, since it is smaller than the sum of its proper divisors (39253709436).

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

21807616260 is a wasteful number, since it uses less digits than its factorization.

21807616260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363460283 (or 363460281 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 21807616260 in words is "twenty-one billion, eight hundred seven million, six hundred sixteen thousand, two hundred sixty".