21601624500460 has 12 divisors (see below), whose sum is σ = 45363411451008. Its totient is φ = 8640649800176.

The previous prime is 21601624500433. The next prime is 21601624500481. The reversal of 21601624500460 is 6400542610612.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540040612492 + ... + 540040612531.

It is an arithmetic number, because the mean of its divisors is an integer number (3780284287584).

Almost surely, 2^{21601624500460} is an apocalyptic number.

21601624500460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21601624500460 is an abundant number, since it is smaller than the sum of its proper divisors (23761786950548).

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

21601624500460 is a wasteful number, since it uses less digits than its factorization.

21601624500460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080081225032 (or 1080081225030 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 21601624500460 in words is "twenty-one trillion, six hundred one billion, six hundred twenty-four million, five hundred thousand, four hundred sixty".