22057786021 has 8 divisors (see below), whose sum is σ = 22819505688. Its totient is φ = 21306720000.

The previous prime is 22057785983. The next prime is 22057786073. The reversal of 22057786021 is 12068775022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5316013921 + 16741772100 = 72911^2 + 129390^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22057786021 - 2⁹ = 22057785509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22057781021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2659200 + ... + 2667481.

It is an arithmetic number, because the mean of its divisors is an integer number (2852438211).

Almost surely, 2^22057786021 is an apocalyptic number.

It is an amenable number.

22057786021 is a deficient number, since it is larger than the sum of its proper divisors (761719667).

22057786021 is a wasteful number, since it uses less digits than its factorization.

22057786021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5326823.

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 22057786021 in words is "twenty-two billion, fifty-seven million, seven hundred eighty-six thousand, twenty-one".