23300021 has 4 divisors (see below), whose sum is σ = 24103500. Its totient is φ = 22496544.

The previous prime is 23299967. The next prime is 23300027. The reversal of 23300021 is 12000332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7980625 + 15319396 = 2825^2 + 3914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23300021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23299975 and 23300011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23300027) 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, 401696 + ... + 401753.

It is an arithmetic number, because the mean of its divisors is an integer number (6025875).

Almost surely, 2^23300021 is an apocalyptic number.

It is an amenable number.

23300021 is a deficient number, since it is larger than the sum of its proper divisors (803479).

23300021 is an equidigital number, since it uses as much as digits as its factorization.

23300021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803478.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 23300021 is about 4827.0095297192. The cubic root of 23300021 is about 285.6179103878.

Adding to 23300021 its reverse (12000332), we get a palindrome (35300353).

The spelling of 23300021 in words is "twenty-three million, three hundred thousand, twenty-one".