18494279 has 2 divisors, whose sum is σ = 18494280. Its totient is φ = 18494278.

The previous prime is 18494263. The next prime is 18494299. The reversal of 18494279 is 97249481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18494279 - 2⁴ = 18494263 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18494299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9247139 + 9247140.

It is an arithmetic number, because the mean of its divisors is an integer number (9247140).

Almost surely, 2^18494279 is an apocalyptic number.

18494279 is a deficient number, since it is larger than the sum of its proper divisors (1).

18494279 is an equidigital number, since it uses as much as digits as its factorization.

18494279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 18494279 is about 4300.4975293563. The cubic root of 18494279 is about 264.4513580815.

The spelling of 18494279 in words is "eighteen million, four hundred ninety-four thousand, two hundred seventy-nine".