23453621 has 4 divisors (see below), whose sum is σ = 23851200. Its totient is φ = 23056044.

The previous prime is 23453603. The next prime is 23453623. The reversal of 23453621 is 12635432.

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 a de Polignac number, because none of the positive numbers 2^k-23453621 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 (23453623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198701 + ... + 198818.

It is an arithmetic number, because the mean of its divisors is an integer number (5962800).

Almost surely, 2^23453621 is an apocalyptic number.

It is an amenable number.

23453621 is a deficient number, since it is larger than the sum of its proper divisors (397579).

23453621 is an equidigital number, since it uses as much as digits as its factorization.

23453621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397578.

The product of its digits is 4320, while the sum is 26.

The square root of 23453621 is about 4842.8938662746. The cubic root of 23453621 is about 286.2441596032.

The spelling of 23453621 in words is "twenty-three million, four hundred fifty-three thousand, six hundred twenty-one".