18346919 has 2 divisors, whose sum is σ = 18346920. Its totient is φ = 18346918.

The previous prime is 18346907. The next prime is 18346921. The reversal of 18346919 is 91964381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18346919 - 2¹⁶ = 18281383 is a prime.

It is a super-2 number, since 2×18346919² = 673218873585122, which contains 22 as substring.

Together with 18346921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18346219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9173459 + 9173460.

It is an arithmetic number, because the mean of its divisors is an integer number (9173460).

Almost surely, 2^18346919 is an apocalyptic number.

18346919 is a deficient number, since it is larger than the sum of its proper divisors (1).

18346919 is an equidigital number, since it uses as much as digits as its factorization.

18346919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 41.

The square root of 18346919 is about 4283.3303631637. The cubic root of 18346919 is about 263.7471130162.

The spelling of 18346919 in words is "eighteen million, three hundred forty-six thousand, nine hundred nineteen".