23845643 has 4 divisors (see below), whose sum is σ = 23866920. Its totient is φ = 23824368.

The previous prime is 23845621. The next prime is 23845663. The reversal of 23845643 is 34654832.

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

It is a cyclic number.

It is not a de Polignac number, because 23845643 - 2⁸ = 23845387 is a prime.

It is a super-2 number, since 2×23845643² = 1137229380166898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23845663) 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, 8858 + ... + 11231.

It is an arithmetic number, because the mean of its divisors is an integer number (5966730).

Almost surely, 2^23845643 is an apocalyptic number.

23845643 is a deficient number, since it is larger than the sum of its proper divisors (21277).

23845643 is a wasteful number, since it uses less digits than its factorization.

23845643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21276.

The product of its digits is 69120, while the sum is 35.

The square root of 23845643 is about 4883.2000778178. The cubic root of 23845643 is about 287.8301910179.

The spelling of 23845643 in words is "twenty-three million, eight hundred forty-five thousand, six hundred forty-three".