18046945 has 32 divisors (see below), whose sum is σ = 26784000. Its totient is φ = 11628288.

The previous prime is 18046943. The next prime is 18046949. The reversal of 18046945 is 54964081.

It is a happy number.

It is not a de Polignac number, because 18046945 - 2¹ = 18046943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18046943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28846 + ... + 29464.

It is an arithmetic number, because the mean of its divisors is an integer number (837000).

Almost surely, 2^18046945 is an apocalyptic number.

It is an amenable number.

18046945 is a deficient number, since it is larger than the sum of its proper divisors (8737055).

18046945 is an equidigital number, since it uses as much as digits as its factorization.

18046945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 18046945 is about 4248.1696058420. The cubic root of 18046945 is about 262.3017762773.

The spelling of 18046945 in words is "eighteen million, forty-six thousand, nine hundred forty-five".