22858640921 has 2 divisors, whose sum is σ = 22858640922. Its totient is φ = 22858640920.

The previous prime is 22858640881. The next prime is 22858640957. The reversal of 22858640921 is 12904685822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14740630921 + 8118010000 = 121411^2 + 90100^2 .

It is a cyclic number.

It is not a de Polignac number, because 22858640921 - 2¹⁰ = 22858639897 is a prime.

It is not a weakly prime, because it can be changed into another prime (22858640621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11429320460 + 11429320461.

It is an arithmetic number, because the mean of its divisors is an integer number (11429320461).

Almost surely, 2^22858640921 is an apocalyptic number.

It is an amenable number.

22858640921 is a deficient number, since it is larger than the sum of its proper divisors (1).

22858640921 is an equidigital number, since it uses as much as digits as its factorization.

22858640921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 22858640921 in words is "twenty-two billion, eight hundred fifty-eight million, six hundred forty thousand, nine hundred twenty-one".