21408748875336 has 32 divisors (see below), whose sum is σ = 53522081863200. Its totient is φ = 7136221668480.

The previous prime is 21408748875313. The next prime is 21408748875341. The reversal of 21408748875336 is 63357884780412.

It is a super-2 number, since 2×21408748875336² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5045556 + ... + 8262876.

It is an arithmetic number, because the mean of its divisors is an integer number (1672565058225).

Almost surely, 2^{21408748875336} is an apocalyptic number.

It is an amenable number.

21408748875336 is an abundant number, since it is smaller than the sum of its proper divisors (32113332987864).

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

21408748875336 is a wasteful number, since it uses less digits than its factorization.

21408748875336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3494589 (or 3494585 counting only the distinct ones).

The product of its (nonzero) digits is 216760320, while the sum is 66.

The spelling of 21408748875336 in words is "twenty-one trillion, four hundred eight billion, seven hundred forty-eight million, eight hundred seventy-five thousand, three hundred thirty-six".