18132643 has 2 divisors, whose sum is σ = 18132644. Its totient is φ = 18132642.

The previous prime is 18132637. The next prime is 18132661. The reversal of 18132643 is 34623181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18132643 - 2⁹ = 18132131 is a prime.

It is equal to p_1159219 and since 18132643 and 1159219 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (18132623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9066321 + 9066322.

It is an arithmetic number, because the mean of its divisors is an integer number (9066322).

Almost surely, 2^18132643 is an apocalyptic number.

18132643 is a deficient number, since it is larger than the sum of its proper divisors (1).

18132643 is an equidigital number, since it uses as much as digits as its factorization.

18132643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 18132643 is about 4258.2441217009. The cubic root of 18132643 is about 262.7163108931.

The spelling of 18132643 in words is "eighteen million, one hundred thirty-two thousand, six hundred forty-three".