21604215103620 has 24 divisors (see below), whose sum is σ = 60491802290304. Its totient is φ = 5761124027616.

The previous prime is 21604215103553. The next prime is 21604215103621. The reversal of 21604215103620 is 2630151240612.

It is a super-2 number, since 2×21604215103620² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21604215103621) 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, 180035125804 + ... + 180035125923.

It is an arithmetic number, because the mean of its divisors is an integer number (2520491762096).

Almost surely, 2^{21604215103620} is an apocalyptic number.

21604215103620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21604215103620 is an abundant number, since it is smaller than the sum of its proper divisors (38887587186684).

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

21604215103620 is a wasteful number, since it uses less digits than its factorization.

21604215103620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360070251739 (or 360070251737 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 21604215103620 in words is "twenty-one trillion, six hundred four billion, two hundred fifteen million, one hundred three thousand, six hundred twenty".