18896939 has 2 divisors, whose sum is σ = 18896940. Its totient is φ = 18896938.

The previous prime is 18896921. The next prime is 18896947. The reversal of 18896939 is 93969881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18896939 - 2¹² = 18892843 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (18896959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9448469 + 9448470.

It is an arithmetic number, because the mean of its divisors is an integer number (9448470).

Almost surely, 2^18896939 is an apocalyptic number.

18896939 is a deficient number, since it is larger than the sum of its proper divisors (1).

18896939 is an equidigital number, since it uses as much as digits as its factorization.

18896939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 53.

The square root of 18896939 is about 4347.0609611552. The cubic root of 18896939 is about 266.3568194599.

The spelling of 18896939 in words is "eighteen million, eight hundred ninety-six thousand, nine hundred thirty-nine".