23103921 has 4 divisors (see below), whose sum is σ = 30805232. Its totient is φ = 15402612.

The previous prime is 23103907. The next prime is 23103953. The reversal of 23103921 is 12930132.

It is a happy number.

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 not a de Polignac number, because 23103921 - 2¹¹ = 23101873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23103961) 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, 3850651 + ... + 3850656.

It is an arithmetic number, because the mean of its divisors is an integer number (7701308).

Almost surely, 2^23103921 is an apocalyptic number.

It is an amenable number.

23103921 is a deficient number, since it is larger than the sum of its proper divisors (7701311).

23103921 is an equidigital number, since it uses as much as digits as its factorization.

23103921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7701310.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 23103921 is about 4806.6538256879. The cubic root of 23103921 is about 284.8143697314.

The spelling of 23103921 in words is "twenty-three million, one hundred three thousand, nine hundred twenty-one".