18265393 has 2 divisors, whose sum is σ = 18265394. Its totient is φ = 18265392.

The previous prime is 18265367. The next prime is 18265421. The reversal of 18265393 is 39356281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10131489 + 8133904 = 3183^2 + 2852^2 .

It is a cyclic number.

It is not a de Polignac number, because 18265393 - 2⁹ = 18264881 is a prime.

It is not a weakly prime, because it can be changed into another prime (18265343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9132696 + 9132697.

It is an arithmetic number, because the mean of its divisors is an integer number (9132697).

Almost surely, 2^18265393 is an apocalyptic number.

It is an amenable number.

18265393 is a deficient number, since it is larger than the sum of its proper divisors (1).

18265393 is an equidigital number, since it uses as much as digits as its factorization.

18265393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 18265393 is about 4273.8031073038. The cubic root of 18265393 is about 263.3558724855.

The spelling of 18265393 in words is "eighteen million, two hundred sixty-five thousand, three hundred ninety-three".