21422511520506 has 96 divisors (see below), whose sum is σ = 48660526407168. Its totient is φ = 6802768748160.

The previous prime is 21422511520499. The next prime is 21422511520523. The reversal of 21422511520506 is 60502511522412.

21422511520506 is a `hidden beast` number, since 2 + 1 + 42 + 2 + 511 + 52 + 0 + 50 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55625400 + ... + 56009196.

It is an arithmetic number, because the mean of its divisors is an integer number (506880483408).

Almost surely, 2^{21422511520506} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21422511520506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24330263203584).

21422511520506 is an abundant number, since it is smaller than the sum of its proper divisors (27238014886662).

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

21422511520506 is a wasteful number, since it uses less digits than its factorization.

21422511520506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385396 (or 385393 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The spelling of 21422511520506 in words is "twenty-one trillion, four hundred twenty-two billion, five hundred eleven million, five hundred twenty thousand, five hundred six".