23994821 has 2 divisors, whose sum is σ = 23994822. Its totient is φ = 23994820.

The previous prime is 23994791. The next prime is 23994851. The reversal of 23994821 is 12849932.

It is a balanced prime because it is at equal distance from previous prime (23994791) and next prime (23994851).

It can be written as a sum of positive squares in only one way, i.e., 13032100 + 10962721 = 3610^2 + 3311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23994821 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23994851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11997410 + 11997411.

It is an arithmetic number, because the mean of its divisors is an integer number (11997411).

Almost surely, 2^23994821 is an apocalyptic number.

It is an amenable number.

23994821 is a deficient number, since it is larger than the sum of its proper divisors (1).

23994821 is an equidigital number, since it uses as much as digits as its factorization.

23994821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 23994821 is about 4898.4508775734. The cubic root of 23994821 is about 288.4291642063.

The spelling of 23994821 in words is "twenty-three million, nine hundred ninety-four thousand, eight hundred twenty-one".