22657643 has 2 divisors, whose sum is σ = 22657644. Its totient is φ = 22657642.

The previous prime is 22657639. The next prime is 22657669. The reversal of 22657643 is 34675622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22657643 - 2² = 22657639 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (22657673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11328821 + 11328822.

It is an arithmetic number, because the mean of its divisors is an integer number (11328822).

Almost surely, 2^22657643 is an apocalyptic number.

22657643 is a deficient number, since it is larger than the sum of its proper divisors (1).

22657643 is an equidigital number, since it uses as much as digits as its factorization.

22657643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 35.

The square root of 22657643 is about 4760.0045168046. The cubic root of 22657643 is about 282.9685981131.

The spelling of 22657643 in words is "twenty-two million, six hundred fifty-seven thousand, six hundred forty-three".