23500013 has 2 divisors, whose sum is σ = 23500014. Its totient is φ = 23500012.

The previous prime is 23500003. The next prime is 23500019. The reversal of 23500013 is 31000532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22250089 + 1249924 = 4717^2 + 1118^2 .

It is a cyclic number.

It is not a de Polignac number, because 23500013 - 2¹⁰ = 23498989 is a prime.

It is a super-2 number, since 2×23500013² = 1104501222000338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23500019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11750006 + 11750007.

It is an arithmetic number, because the mean of its divisors is an integer number (11750007).

Almost surely, 2^23500013 is an apocalyptic number.

It is an amenable number.

23500013 is a deficient number, since it is larger than the sum of its proper divisors (1).

23500013 is an equidigital number, since it uses as much as digits as its factorization.

23500013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 23500013 is about 4847.6811982638. The cubic root of 23500013 is about 286.4327686165.

Adding to 23500013 its reverse (31000532), we get a palindrome (54500545).

The spelling of 23500013 in words is "twenty-three million, five hundred thousand, thirteen".