21222562504 has 64 divisors (see below), whose sum is σ = 46847808000. Its totient is φ = 8885752320.

The previous prime is 21222562477. The next prime is 21222562511. The reversal of 21222562504 is 40526522212.

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, 528612 + ... + 567340.

It is an arithmetic number, because the mean of its divisors is an integer number (731997000).

Almost surely, 2^21222562504 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 21222562504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23423904000).

21222562504 is an abundant number, since it is smaller than the sum of its proper divisors (25625245496).

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

21222562504 is a wasteful number, since it uses less digits than its factorization.

21222562504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39238 (or 39234 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 21222562504 in words is "twenty-one billion, two hundred twenty-two million, five hundred sixty-two thousand, five hundred four".