22021102008 has 48 divisors (see below), whose sum is σ = 60110119680. Its totient is φ = 7282566144.

The previous prime is 22021102001. The next prime is 22021102039. The reversal of 22021102008 is 80020112022.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021102001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1194985 + ... + 1213272.

It is an arithmetic number, because the mean of its divisors is an integer number (1252294160).

Almost surely, 2^22021102008 is an apocalyptic number.

It is an amenable number.

22021102008 is an abundant number, since it is smaller than the sum of its proper divisors (38089017672).

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

22021102008 is a wasteful number, since it uses less digits than its factorization.

22021102008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408396 (or 2408389 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The spelling of 22021102008 in words is "twenty-two billion, twenty-one million, one hundred two thousand, eight".