18908983 has 2 divisors, whose sum is σ = 18908984. Its totient is φ = 18908982.

The previous prime is 18908959. The next prime is 18908999. The reversal of 18908983 is 38980981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18908983 - 2⁵ = 18908951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18908083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9454491 + 9454492.

It is an arithmetic number, because the mean of its divisors is an integer number (9454492).

Almost surely, 2^18908983 is an apocalyptic number.

18908983 is a deficient number, since it is larger than the sum of its proper divisors (1).

18908983 is an equidigital number, since it uses as much as digits as its factorization.

18908983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 18908983 is about 4348.4460442783. The cubic root of 18908983 is about 266.4133951171.

It can be divided in two parts, 18908 and 983, that added together give a palindrome (19891).

The spelling of 18908983 in words is "eighteen million, nine hundred eight thousand, nine hundred eighty-three".