23396021 has 4 divisors (see below), whose sum is σ = 25522944. Its totient is φ = 21269100.

The previous prime is 23396017. The next prime is 23396033. The reversal of 23396021 is 12069332.

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 23396021 - 2² = 23396017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23396081) 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, 1063445 + ... + 1063466.

It is an arithmetic number, because the mean of its divisors is an integer number (6380736).

Almost surely, 2^23396021 is an apocalyptic number.

It is an amenable number.

23396021 is a deficient number, since it is larger than the sum of its proper divisors (2126923).

23396021 is a wasteful number, since it uses less digits than its factorization.

23396021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126922.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 23396021 is about 4836.9433529865. The cubic root of 23396021 is about 286.0096374733.

The spelling of 23396021 in words is "twenty-three million, three hundred ninety-six thousand, twenty-one".