18146971 has 2 divisors, whose sum is σ = 18146972. Its totient is φ = 18146970.

The previous prime is 18146963. The next prime is 18146981. The reversal of 18146971 is 17964181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18146971 - 2³ = 18146963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18146971.

It is not a weakly prime, because it can be changed into another prime (18146911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9073485 + 9073486.

It is an arithmetic number, because the mean of its divisors is an integer number (9073486).

Almost surely, 2^18146971 is an apocalyptic number.

18146971 is a deficient number, since it is larger than the sum of its proper divisors (1).

18146971 is an equidigital number, since it uses as much as digits as its factorization.

18146971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 37.

The square root of 18146971 is about 4259.9261730692. The cubic root of 18146971 is about 262.7854901495.

The spelling of 18146971 in words is "eighteen million, one hundred forty-six thousand, nine hundred seventy-one".