21601630415060 has 24 divisors (see below), whose sum is σ = 45364229604960. Its totient is φ = 8640498693024.

The previous prime is 21601630415051. The next prime is 21601630415069. The reversal of 21601630415060 is 6051403610612.

It is an interprime number because it is at equal distance from previous prime (21601630415051) and next prime (21601630415069).

It is a self number, because there is not a number n which added to its sum of digits gives 21601630415060.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21601630415069) 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, 8434490 + ... + 10693169.

It is an arithmetic number, because the mean of its divisors is an integer number (1890176233540).

Almost surely, 2^{21601630415060} is an apocalyptic number.

21601630415060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21601630415060 is an abundant number, since it is smaller than the sum of its proper divisors (23762599189900).

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

21601630415060 is a wasteful number, since it uses less digits than its factorization.

21601630415060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19184135 (or 19184133 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 21601630415060 in words is "twenty-one trillion, six hundred one billion, six hundred thirty million, four hundred fifteen thousand, sixty".