18814619 has 2 divisors, whose sum is σ = 18814620. Its totient is φ = 18814618.

The previous prime is 18814589. The next prime is 18814633. The reversal of 18814619 is 91641881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18814619 - 2²⁰ = 17766043 is a prime.

It is a super-2 number, since 2×18814619² = 707979776230322, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (18814819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9407309 + 9407310.

It is an arithmetic number, because the mean of its divisors is an integer number (9407310).

Almost surely, 2^18814619 is an apocalyptic number.

18814619 is a deficient number, since it is larger than the sum of its proper divisors (1).

18814619 is an equidigital number, since it uses as much as digits as its factorization.

18814619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 38.

The square root of 18814619 is about 4337.5821606051. The cubic root of 18814619 is about 265.9694831857.

The spelling of 18814619 in words is "eighteen million, eight hundred fourteen thousand, six hundred nineteen".