23345921 has 4 divisors (see below), whose sum is σ = 23387952. Its totient is φ = 23303892.

The previous prime is 23345909. The next prime is 23345929. The reversal of 23345921 is 12954332.

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 23345921 - 2¹⁸ = 23083777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23345929) 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, 20171 + ... + 21296.

It is an arithmetic number, because the mean of its divisors is an integer number (5846988).

Almost surely, 2^23345921 is an apocalyptic number.

It is an amenable number.

23345921 is a deficient number, since it is larger than the sum of its proper divisors (42031).

23345921 is an equidigital number, since it uses as much as digits as its factorization.

23345921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42030.

The product of its digits is 6480, while the sum is 29.

The square root of 23345921 is about 4831.7616870040. The cubic root of 23345921 is about 285.8053388724.

The spelling of 23345921 in words is "twenty-three million, three hundred forty-five thousand, nine hundred twenty-one".