21653126360 has 32 divisors (see below), whose sum is σ = 48842289360. Its totient is φ = 8639427456.

The previous prime is 21653126317. The next prime is 21653126393. The reversal of 21653126360 is 6362135612.

It is a self number, because there is not a number n which added to its sum of digits gives 21653126360.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665894 + ... + 697653.

Almost surely, 2^21653126360 is an apocalyptic number.

21653126360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21653126360 is an abundant number, since it is smaller than the sum of its proper divisors (27189163000).

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

21653126360 is a wasteful number, since it uses less digits than its factorization.

21653126360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363955 (or 1363951 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 21653126360 in words is "twenty-one billion, six hundred fifty-three million, one hundred twenty-six thousand, three hundred sixty".