18265487 has 2 divisors, whose sum is σ = 18265488. Its totient is φ = 18265486.

The previous prime is 18265477. The next prime is 18265493. The reversal of 18265487 is 78456281.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18265487 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 (18265477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9132743 + 9132744.

It is an arithmetic number, because the mean of its divisors is an integer number (9132744).

Almost surely, 2^18265487 is an apocalyptic number.

18265487 is a deficient number, since it is larger than the sum of its proper divisors (1).

18265487 is an equidigital number, since it uses as much as digits as its factorization.

18265487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 41.

The square root of 18265487 is about 4273.8141045207. The cubic root of 18265487 is about 263.3563242580.

The spelling of 18265487 in words is "eighteen million, two hundred sixty-five thousand, four hundred eighty-seven".