23553643 has 2 divisors, whose sum is σ = 23553644. Its totient is φ = 23553642.

The previous prime is 23553623. The next prime is 23553671. The reversal of 23553643 is 34635532.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23553643 - 2¹⁷ = 23422571 is a prime.

It is not a weakly prime, because it can be changed into another prime (23553623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11776821 + 11776822.

It is an arithmetic number, because the mean of its divisors is an integer number (11776822).

Almost surely, 2^23553643 is an apocalyptic number.

23553643 is a deficient number, since it is larger than the sum of its proper divisors (1).

23553643 is an equidigital number, since it uses as much as digits as its factorization.

23553643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 31.

The square root of 23553643 is about 4853.2095565718. The cubic root of 23553643 is about 286.6504950014.

The spelling of 23553643 in words is "twenty-three million, five hundred fifty-three thousand, six hundred forty-three".