18813419 has 2 divisors, whose sum is σ = 18813420. Its totient is φ = 18813418.

The previous prime is 18813391. The next prime is 18813449. The reversal of 18813419 is 91431881.

It is a weak prime.

It is an emirp because it is prime and its reverse (91431881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18813419 - 2⁸ = 18813163 is a prime.

It is a super-2 number, since 2×18813419² = 707889468939122, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1199906 and since 18813419 and 1199906 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 (18813449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9406709 + 9406710.

It is an arithmetic number, because the mean of its divisors is an integer number (9406710).

Almost surely, 2^18813419 is an apocalyptic number.

18813419 is a deficient number, since it is larger than the sum of its proper divisors (1).

18813419 is an equidigital number, since it uses as much as digits as its factorization.

18813419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 35.

The square root of 18813419 is about 4337.4438324894. The cubic root of 18813419 is about 265.9638285373.

The spelling of 18813419 in words is "eighteen million, eight hundred thirteen thousand, four hundred nineteen".