18323419 has 2 divisors, whose sum is σ = 18323420. Its totient is φ = 18323418.

The previous prime is 18323381. The next prime is 18323423. The reversal of 18323419 is 91432381.

It is a strong prime.

It is an emirp because it is prime and its reverse (91432381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18323419 - 2¹¹ = 18321371 is a prime.

It is a super-2 number, since 2×18323419² = 671495367699122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18323489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9161709 + 9161710.

It is an arithmetic number, because the mean of its divisors is an integer number (9161710).

Almost surely, 2^18323419 is an apocalyptic number.

18323419 is a deficient number, since it is larger than the sum of its proper divisors (1).

18323419 is an equidigital number, since it uses as much as digits as its factorization.

18323419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 18323419 is about 4280.5862916194. The cubic root of 18323419 is about 263.6344564017.

The spelling of 18323419 in words is "eighteen million, three hundred twenty-three thousand, four hundred nineteen".