22021770990 has 16 divisors (see below), whose sum is σ = 52852250448. Its totient is φ = 5872472256.

The previous prime is 22021770961. The next prime is 22021771007. The reversal of 22021770990 is 9907712022.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367029487 + ... + 367029546.

It is an arithmetic number, because the mean of its divisors is an integer number (3303265653).

Almost surely, 2^22021770990 is an apocalyptic number.

22021770990 is an abundant number, since it is smaller than the sum of its proper divisors (30830479458).

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

22021770990 is a wasteful number, since it uses less digits than its factorization.

22021770990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734059043.

The product of its (nonzero) digits is 31752, while the sum is 39.

The spelling of 22021770990 in words is "twenty-two billion, twenty-one million, seven hundred seventy thousand, nine hundred ninety".