18799619 has 2 divisors, whose sum is σ = 18799620. Its totient is φ = 18799618.

The previous prime is 18799601. The next prime is 18799621. The reversal of 18799619 is 91699781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18799619 - 2²⁴ = 2022403 is a prime.

It is a super-2 number, since 2×18799619² = 706851349090322, which contains 22 as substring.

Together with 18799621, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18799699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9399809 + 9399810.

It is an arithmetic number, because the mean of its divisors is an integer number (9399810).

Almost surely, 2^18799619 is an apocalyptic number.

18799619 is a deficient number, since it is larger than the sum of its proper divisors (1).

18799619 is an equidigital number, since it uses as much as digits as its factorization.

18799619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 50.

The square root of 18799619 is about 4335.8527419644. The cubic root of 18799619 is about 265.8987827915.

The spelling of 18799619 in words is "eighteen million, seven hundred ninety-nine thousand, six hundred nineteen".