18744983 has 2 divisors, whose sum is σ = 18744984. Its totient is φ = 18744982.

The previous prime is 18744941. The next prime is 18744997. The reversal of 18744983 is 38944781.

It is a strong prime.

It is an emirp because it is prime and its reverse (38944781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18744983 - 2⁶ = 18744919 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18744683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9372491 + 9372492.

It is an arithmetic number, because the mean of its divisors is an integer number (9372492).

Almost surely, 2^18744983 is an apocalyptic number.

18744983 is a deficient number, since it is larger than the sum of its proper divisors (1).

18744983 is an equidigital number, since it uses as much as digits as its factorization.

18744983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The square root of 18744983 is about 4329.5476669047. The cubic root of 18744983 is about 265.6409452573.

The spelling of 18744983 in words is "eighteen million, seven hundred forty-four thousand, nine hundred eighty-three".