18345071 has 2 divisors, whose sum is σ = 18345072. Its totient is φ = 18345070.

The previous prime is 18345037. The next prime is 18345083. The reversal of 18345071 is 17054381.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18345071 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 (18345011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9172535 + 9172536.

It is an arithmetic number, because the mean of its divisors is an integer number (9172536).

Almost surely, 2^18345071 is an apocalyptic number.

18345071 is a deficient number, since it is larger than the sum of its proper divisors (1).

18345071 is an equidigital number, since it uses as much as digits as its factorization.

18345071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 18345071 is about 4283.1146377374. The cubic root of 18345071 is about 263.7382573780.

It can be divided in two parts, 183 and 45071, that added together give a palindrome (45254).

The spelling of 18345071 in words is "eighteen million, three hundred forty-five thousand, seventy-one".