18012419 has 2 divisors, whose sum is σ = 18012420. Its totient is φ = 18012418.

The previous prime is 18012413. The next prime is 18012431. The reversal of 18012419 is 91421081.

It is a weak prime.

It is an emirp because it is prime and its reverse (91421081) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18012419 is a prime.

It is a super-2 number, since 2×18012419² = 648894476463122, which contains 22 as substring.

It is equal to p_1152098 and since 18012419 and 1152098 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (18012413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9006209 + 9006210.

It is an arithmetic number, because the mean of its divisors is an integer number (9006210).

Almost surely, 2^18012419 is an apocalyptic number.

18012419 is a deficient number, since it is larger than the sum of its proper divisors (1).

18012419 is an equidigital number, since it uses as much as digits as its factorization.

18012419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 18012419 is about 4244.1040279428. The cubic root of 18012419 is about 262.1343977636.

The spelling of 18012419 in words is "eighteen million, twelve thousand, four hundred nineteen".