23720023 has 2 divisors, whose sum is σ = 23720024. Its totient is φ = 23720022.

The previous prime is 23720003. The next prime is 23720027. The reversal of 23720023 is 32002732.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23720023 - 2¹⁷ = 23588951 is a prime.

It is a super-2 number, since 2×23720023² = 1125278982241058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23720027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11860011 + 11860012.

It is an arithmetic number, because the mean of its divisors is an integer number (11860012).

Almost surely, 2^23720023 is an apocalyptic number.

23720023 is a deficient number, since it is larger than the sum of its proper divisors (1).

23720023 is an equidigital number, since it uses as much as digits as its factorization.

23720023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 23720023 is about 4870.3206259958. The cubic root of 23720023 is about 287.3238664069.

Adding to 23720023 its reverse (32002732), we get a palindrome (55722755).

The spelling of 23720023 in words is "twenty-three million, seven hundred twenty thousand, twenty-three".