18366479 has 2 divisors, whose sum is σ = 18366480. Its totient is φ = 18366478.

The previous prime is 18366457. The next prime is 18366497. The reversal of 18366479 is 97466381.

Together with next prime (18366497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (97466381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18366479 - 2²⁰ = 17317903 is a 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 (18366419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9183239 + 9183240.

It is an arithmetic number, because the mean of its divisors is an integer number (9183240).

Almost surely, 2^18366479 is an apocalyptic number.

18366479 is a deficient number, since it is larger than the sum of its proper divisors (1).

18366479 is an equidigital number, since it uses as much as digits as its factorization.

18366479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 18366479 is about 4285.6130249942. The cubic root of 18366479 is about 263.8408083352.

The spelling of 18366479 in words is "eighteen million, three hundred sixty-six thousand, four hundred seventy-nine".