23325821 has 4 divisors (see below), whose sum is σ = 23335644. Its totient is φ = 23316000.

The previous prime is 23325817. The next prime is 23325829. The reversal of 23325821 is 12852332.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12996025 + 10329796 = 3605^2 + 3214^2 .

It is a cyclic number.

It is not a de Polignac number, because 23325821 - 2² = 23325817 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 (23325829) 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, 1121 + ... + 6921.

It is an arithmetic number, because the mean of its divisors is an integer number (5833911).

Almost surely, 2^23325821 is an apocalyptic number.

It is an amenable number.

23325821 is a deficient number, since it is larger than the sum of its proper divisors (9823).

23325821 is an equidigital number, since it uses as much as digits as its factorization.

23325821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9822.

The product of its digits is 2880, while the sum is 26.

The square root of 23325821 is about 4829.6812524224. The cubic root of 23325821 is about 285.7232926089.

The spelling of 23325821 in words is "twenty-three million, three hundred twenty-five thousand, eight hundred twenty-one".