18888119 has 2 divisors, whose sum is σ = 18888120. Its totient is φ = 18888118.

The previous prime is 18888113. The next prime is 18888151. The reversal of 18888119 is 91188881.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18888119 is a prime.

It is a super-2 number, since 2×18888119² = 713522078716322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18888119.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18888113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9444059 + 9444060.

It is an arithmetic number, because the mean of its divisors is an integer number (9444060).

Almost surely, 2^18888119 is an apocalyptic number.

18888119 is a deficient number, since it is larger than the sum of its proper divisors (1).

18888119 is an equidigital number, since it uses as much as digits as its factorization.

18888119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 44.

The square root of 18888119 is about 4346.0463642258. The cubic root of 18888119 is about 266.3153730164.

The spelling of 18888119 in words is "eighteen million, eight hundred eighty-eight thousand, one hundred nineteen".