23986021 has 2 divisors, whose sum is σ = 23986022. Its totient is φ = 23986020.

The previous prime is 23986009. The next prime is 23986049. The reversal of 23986021 is 12068932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20884900 + 3101121 = 4570^2 + 1761^2 .

It is a cyclic number.

It is not a de Polignac number, because 23986021 - 2⁷ = 23985893 is a prime.

It is a Chen prime.

It is equal to p_1506289 and since 23986021 and 1506289 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23986321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11993010 + 11993011.

It is an arithmetic number, because the mean of its divisors is an integer number (11993011).

Almost surely, 2^23986021 is an apocalyptic number.

It is an amenable number.

23986021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23986021 is an equidigital number, since it uses as much as digits as its factorization.

23986021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 23986021 is about 4897.5525520407. The cubic root of 23986021 is about 288.3938998327.

The spelling of 23986021 in words is "twenty-three million, nine hundred eighty-six thousand, twenty-one".