18272459 has 2 divisors, whose sum is σ = 18272460. Its totient is φ = 18272458.

The previous prime is 18272453. The next prime is 18272473. The reversal of 18272459 is 95427281.

It is a weak prime.

It is an emirp because it is prime and its reverse (95427281) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18272459 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18272453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9136229 + 9136230.

It is an arithmetic number, because the mean of its divisors is an integer number (9136230).

Almost surely, 2^18272459 is an apocalyptic number.

18272459 is a deficient number, since it is larger than the sum of its proper divisors (1).

18272459 is an equidigital number, since it uses as much as digits as its factorization.

18272459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 38.

The square root of 18272459 is about 4274.6296915639. The cubic root of 18272459 is about 263.3898280043.

The spelling of 18272459 in words is "eighteen million, two hundred seventy-two thousand, four hundred fifty-nine".