18953413 has 2 divisors, whose sum is σ = 18953414. Its totient is φ = 18953412.

The previous prime is 18953401. The next prime is 18953423. The reversal of 18953413 is 31435981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9941409 + 9012004 = 3153^2 + 3002^2 .

It is a cyclic number.

It is not a de Polignac number, because 18953413 - 2⁵ = 18953381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18953423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9476706 + 9476707.

It is an arithmetic number, because the mean of its divisors is an integer number (9476707).

Almost surely, 2^18953413 is an apocalyptic number.

It is an amenable number.

18953413 is a deficient number, since it is larger than the sum of its proper divisors (1).

18953413 is an equidigital number, since it uses as much as digits as its factorization.

18953413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 18953413 is about 4353.5517683841. The cubic root of 18953413 is about 266.6218936984.

The spelling of 18953413 in words is "eighteen million, nine hundred fifty-three thousand, four hundred thirteen".