22635643 has 2 divisors, whose sum is σ = 22635644. Its totient is φ = 22635642.

The previous prime is 22635583. The next prime is 22635659. The reversal of 22635643 is 34653622.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22635643 - 2²¹ = 20538491 is a prime.

It is equal to p_1426729 and since 22635643 and 1426729 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (22635043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11317821 + 11317822.

It is an arithmetic number, because the mean of its divisors is an integer number (11317822).

Almost surely, 2^22635643 is an apocalyptic number.

22635643 is a deficient number, since it is larger than the sum of its proper divisors (1).

22635643 is an equidigital number, since it uses as much as digits as its factorization.

22635643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 31.

The square root of 22635643 is about 4757.6930333934. The cubic root of 22635643 is about 282.8769833305.

The spelling of 22635643 in words is "twenty-two million, six hundred thirty-five thousand, six hundred forty-three".