23440453 has 4 divisors (see below), whose sum is σ = 23463808. Its totient is φ = 23417100.

The previous prime is 23440441. The next prime is 23440457. The reversal of 23440453 is 35404432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23440453 - 2⁵ = 23440421 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 (23440457) 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, 10101 + ... + 12202.

It is an arithmetic number, because the mean of its divisors is an integer number (5865952).

Almost surely, 2^23440453 is an apocalyptic number.

It is an amenable number.

23440453 is a deficient number, since it is larger than the sum of its proper divisors (23355).

23440453 is a wasteful number, since it uses less digits than its factorization.

23440453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23354.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 23440453 is about 4841.5341576818. The cubic root of 23440453 is about 286.1905791244.

Adding to 23440453 its reverse (35404432), we get a palindrome (58844885).

The spelling of 23440453 in words is "twenty-three million, four hundred forty thousand, four hundred fifty-three".