21424422633664 has 112 divisors (see below), whose sum is σ = 43941075948000. Its totient is φ = 10357545369600.

The previous prime is 21424422633587. The next prime is 21424422633689. The reversal of 21424422633664 is 46633622442412.

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, 264298612 + ... + 264379660.

It is an arithmetic number, because the mean of its divisors is an integer number (392331035250).

Almost surely, 2^{21424422633664} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21424422633664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21970537974000).

21424422633664 is an abundant number, since it is smaller than the sum of its proper divisors (22516653314336).

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

21424422633664 is a wasteful number, since it uses less digits than its factorization.

21424422633664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82002 (or 81992 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 49.

The spelling of 21424422633664 in words is "twenty-one trillion, four hundred twenty-four billion, four hundred twenty-two million, six hundred thirty-three thousand, six hundred sixty-four".