23643445 has 16 divisors (see below), whose sum is σ = 32542848. Its totient is φ = 16153920.

The previous prime is 23643443. The next prime is 23643449. The reversal of 23643445 is 54434632.

It is not a de Polignac number, because 23643445 - 2¹ = 23643443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23643443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10030 + ... + 12160.

It is an arithmetic number, because the mean of its divisors is an integer number (2033928).

Almost surely, 2^23643445 is an apocalyptic number.

It is an amenable number.

23643445 is a deficient number, since it is larger than the sum of its proper divisors (8899403).

23643445 is a wasteful number, since it uses less digits than its factorization.

23643445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2460.

The product of its digits is 34560, while the sum is 31.

The square root of 23643445 is about 4862.4525704628. The cubic root of 23643445 is about 287.0143331557.

It can be divided in two parts, 236 and 43445, that added together give a square (43681 = 209²).

The spelling of 23643445 in words is "twenty-three million, six hundred forty-three thousand, four hundred forty-five".