18134819 has 2 divisors, whose sum is σ = 18134820. Its totient is φ = 18134818.

The previous prime is 18134813. The next prime is 18134839. The reversal of 18134819 is 91843181.

It is a weak prime.

It is an emirp because it is prime and its reverse (91843181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18134819 - 2²⁰ = 17086243 is a prime.

It is a super-2 number, since 2×18134819² = 657743320325522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18134813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9067409 + 9067410.

It is an arithmetic number, because the mean of its divisors is an integer number (9067410).

Almost surely, 2^18134819 is an apocalyptic number.

18134819 is a deficient number, since it is larger than the sum of its proper divisors (1).

18134819 is an equidigital number, since it uses as much as digits as its factorization.

18134819 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 18134819 is about 4258.4996184102. The cubic root of 18134819 is about 262.7268195253.

The spelling of 18134819 in words is "eighteen million, one hundred thirty-four thousand, eight hundred nineteen".