18713963 has 2 divisors, whose sum is σ = 18713964. Its totient is φ = 18713962.

The previous prime is 18713951. The next prime is 18714011. The reversal of 18713963 is 36931781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18713963 - 2⁶ = 18713899 is a prime.

It is a super-2 number, since 2×18713963² = 700424822330738, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18713663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9356981 + 9356982.

It is an arithmetic number, because the mean of its divisors is an integer number (9356982).

Almost surely, 2^18713963 is an apocalyptic number.

18713963 is a deficient number, since it is larger than the sum of its proper divisors (1).

18713963 is an equidigital number, since it uses as much as digits as its factorization.

18713963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 38.

The square root of 18713963 is about 4325.9638232422. The cubic root of 18713963 is about 265.4943330197.

The spelling of 18713963 in words is "eighteen million, seven hundred thirteen thousand, nine hundred sixty-three".