18245047 has 2 divisors, whose sum is σ = 18245048. Its totient is φ = 18245046.

The previous prime is 18245023. The next prime is 18245053. The reversal of 18245047 is 74054281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18245047 - 2¹¹ = 18242999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18245057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9122523 + 9122524.

It is an arithmetic number, because the mean of its divisors is an integer number (9122524).

Almost surely, 2^18245047 is an apocalyptic number.

18245047 is a deficient number, since it is larger than the sum of its proper divisors (1).

18245047 is an equidigital number, since it uses as much as digits as its factorization.

18245047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 18245047 is about 4271.4221285188. The cubic root of 18245047 is about 263.2580512607.

The spelling of 18245047 in words is "eighteen million, two hundred forty-five thousand, forty-seven".