21313910218080 has 192 divisors, whose sum is σ = 70678207756800. Its totient is φ = 5384127283200.

The previous prime is 21313910218033. The next prime is 21313910218109. The reversal of 21313910218080 is 8081201931312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119921280 + ... + 120098880.

It is an arithmetic number, because the mean of its divisors is an integer number (368115665400).

Almost surely, 2^{21313910218080} is an apocalyptic number.

21313910218080 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 21313910218080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35339103878400).

21313910218080 is an abundant number, since it is smaller than the sum of its proper divisors (49364297538720).

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

21313910218080 is a wasteful number, since it uses less digits than its factorization.

21313910218080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190797 (or 190789 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The spelling of 21313910218080 in words is "twenty-one trillion, three hundred thirteen billion, nine hundred ten million, two hundred eighteen thousand, eighty".