18302147 has 2 divisors, whose sum is σ = 18302148. Its totient is φ = 18302146.

The previous prime is 18302143. The next prime is 18302153. The reversal of 18302147 is 74120381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18302147 - 2² = 18302143 is a prime.

It is not a weakly prime, because it can be changed into another prime (18302143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9151073 + 9151074.

It is an arithmetic number, because the mean of its divisors is an integer number (9151074).

Almost surely, 2^18302147 is an apocalyptic number.

18302147 is a deficient number, since it is larger than the sum of its proper divisors (1).

18302147 is an equidigital number, since it uses as much as digits as its factorization.

18302147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 18302147 is about 4278.1008637011. The cubic root of 18302147 is about 263.5323975062.

The spelling of 18302147 in words is "eighteen million, three hundred two thousand, one hundred forty-seven".