22490290812 has 144 divisors (see below), whose sum is σ = 60525903872. Its totient is φ = 6486480000.

The previous prime is 22490290807. The next prime is 22490290819. The reversal of 22490290812 is 21809209422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22490290819) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2741637 + ... + 2749827.

Almost surely, 2^22490290812 is an apocalyptic number.

22490290812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22490290812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30262951936).

22490290812 is an abundant number, since it is smaller than the sum of its proper divisors (38035613060).

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

22490290812 is a wasteful number, since it uses less digits than its factorization.

22490290812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8312 (or 8299 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 22490290812 in words is "twenty-two billion, four hundred ninety million, two hundred ninety thousand, eight hundred twelve".