23458021 has 2 divisors, whose sum is σ = 23458022. Its totient is φ = 23458020.

The previous prime is 23457983. The next prime is 23458033. The reversal of 23458021 is 12085432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18395521 + 5062500 = 4289^2 + 2250^2 .

It is a cyclic number.

It is not a de Polignac number, because 23458021 - 2⁹ = 23457509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23458051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11729010 + 11729011.

It is an arithmetic number, because the mean of its divisors is an integer number (11729011).

Almost surely, 2^23458021 is an apocalyptic number.

It is an amenable number.

23458021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23458021 is an equidigital number, since it uses as much as digits as its factorization.

23458021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 23458021 is about 4843.3481188120. The cubic root of 23458021 is about 286.2620586950.

The spelling of 23458021 in words is "twenty-three million, four hundred fifty-eight thousand, twenty-one".