23235643 has 4 divisors (see below), whose sum is σ = 23802408. Its totient is φ = 22668880.

The previous prime is 23235637. The next prime is 23235659. The reversal of 23235643 is 34653232.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23235643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23235623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283321 + ... + 283402.

It is an arithmetic number, because the mean of its divisors is an integer number (5950602).

Almost surely, 2^23235643 is an apocalyptic number.

23235643 is a deficient number, since it is larger than the sum of its proper divisors (566765).

23235643 is an equidigital number, since it uses as much as digits as its factorization.

23235643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566764.

The product of its digits is 12960, while the sum is 28.

The square root of 23235643 is about 4820.3363990493. The cubic root of 23235643 is about 285.3546134751.

Adding to 23235643 its reverse (34653232), we get a palindrome (57888875).

The spelling of 23235643 in words is "twenty-three million, two hundred thirty-five thousand, six hundred forty-three".