18274819 has 2 divisors, whose sum is σ = 18274820. Its totient is φ = 18274818.

The previous prime is 18274799. The next prime is 18274829. The reversal of 18274819 is 91847281.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18274819 - 2⁵ = 18274787 is a prime.

It is a super-2 number, since 2×18274819² = 667938018965522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18274829) 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, 9137409 + 9137410.

It is an arithmetic number, because the mean of its divisors is an integer number (9137410).

Almost surely, 2^18274819 is an apocalyptic number.

18274819 is a deficient number, since it is larger than the sum of its proper divisors (1).

18274819 is an equidigital number, since it uses as much as digits as its factorization.

18274819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 40.

The square root of 18274819 is about 4274.9057299548. The cubic root of 18274819 is about 263.4011669860.

The spelling of 18274819 in words is "eighteen million, two hundred seventy-four thousand, eight hundred nineteen".