21673216615360 has 28 divisors (see below), whose sum is σ = 51609347066088. Its totient is φ = 8669286646016.

The previous prime is 21673216615343. The next prime is 21673216615361. The reversal of 21673216615360 is 6351661237612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21673216615361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33864400642 + ... + 33864401281.

It is an arithmetic number, because the mean of its divisors is an integer number (1843190966646).

Almost surely, 2^{21673216615360} is an apocalyptic number.

21673216615360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21673216615360 is an abundant number, since it is smaller than the sum of its proper divisors (29936130450728).

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

21673216615360 is an equidigital number, since it uses as much as digits as its factorization.

21673216615360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67728801940 (or 67728801930 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 21673216615360 in words is "twenty-one trillion, six hundred seventy-three billion, two hundred sixteen million, six hundred fifteen thousand, three hundred sixty".