21074980245760 has 144 divisors (see below), whose sum is σ = 57748311129600. Its totient is φ = 7218749841408.

The previous prime is 21074980245757. The next prime is 21074980245833. The reversal of 21074980245760 is 6754208947012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8177526 + ... + 10441354.

It is an arithmetic number, because the mean of its divisors is an integer number (401029938400).

Almost surely, 2^{21074980245760} is an apocalyptic number.

21074980245760 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 21074980245760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28874155564800).

21074980245760 is an abundant number, since it is smaller than the sum of its proper divisors (36673330883840).

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

21074980245760 is a wasteful number, since it uses less digits than its factorization.

21074980245760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2264896 (or 2264882 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 21074980245760 in words is "twenty-one trillion, seventy-four billion, nine hundred eighty million, two hundred forty-five thousand, seven hundred sixty".