18438883 has 2 divisors, whose sum is σ = 18438884. Its totient is φ = 18438882.

The previous prime is 18438881. The next prime is 18438907. The reversal of 18438883 is 38883481.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18438883 - 2¹ = 18438881 is a prime.

Together with 18438881, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18438881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9219441 + 9219442.

It is an arithmetic number, because the mean of its divisors is an integer number (9219442).

Almost surely, 2^18438883 is an apocalyptic number.

18438883 is a deficient number, since it is larger than the sum of its proper divisors (1).

18438883 is an equidigital number, since it uses as much as digits as its factorization.

18438883 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 147456, while the sum is 43.

The square root of 18438883 is about 4294.0520490558. The cubic root of 18438883 is about 264.1870565563.

It can be divided in two parts, 18438 and 883, that added together give a square (19321 = 139²).

The spelling of 18438883 in words is "eighteen million, four hundred thirty-eight thousand, eight hundred eighty-three".