22021949057 has 2 divisors, whose sum is σ = 22021949058. Its totient is φ = 22021949056.

The previous prime is 22021949009. The next prime is 22021949083. The reversal of 22021949057 is 75094912022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19530342001 + 2491607056 = 139751^2 + 49916^2 .

It is a cyclic number.

It is not a de Polignac number, because 22021949057 - 2²⁰ = 22020900481 is a prime.

It is not a weakly prime, because it can be changed into another prime (22021949557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010974528 + 11010974529.

It is an arithmetic number, because the mean of its divisors is an integer number (11010974529).

Almost surely, 2^22021949057 is an apocalyptic number.

It is an amenable number.

22021949057 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021949057 is an equidigital number, since it uses as much as digits as its factorization.

22021949057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 22021949057 in words is "twenty-two billion, twenty-one million, nine hundred forty-nine thousand, fifty-seven".