21373602163760 has 160 divisors (see below), whose sum is σ = 61962855552000. Its totient is φ = 6661131310080.

The previous prime is 21373602163759. The next prime is 21373602163763. The reversal of 21373602163760 is 6736120637312.

It is not an unprimeable number, because it can be changed into a prime (21373602163763) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54251966 + ... + 54644514.

It is an arithmetic number, because the mean of its divisors is an integer number (387267847200).

Almost surely, 2^{21373602163760} is an apocalyptic number.

21373602163760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21373602163760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30981427776000).

21373602163760 is an abundant number, since it is smaller than the sum of its proper divisors (40589253388240).

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

21373602163760 is a wasteful number, since it uses less digits than its factorization.

21373602163760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401419 (or 401413 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 47.

The spelling of 21373602163760 in words is "twenty-one trillion, three hundred seventy-three billion, six hundred two million, one hundred sixty-three thousand, seven hundred sixty".