18473145 has 16 divisors (see below), whose sum is σ = 30576960. Its totient is φ = 9512384.

The previous prime is 18473141. The next prime is 18473159. The reversal of 18473145 is 54137481.

It is a cyclic number.

It is not a de Polignac number, because 18473145 - 2² = 18473141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18473141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20799 + ... + 21668.

It is an arithmetic number, because the mean of its divisors is an integer number (1911060).

Almost surely, 2^18473145 is an apocalyptic number.

18473145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18473145 is a deficient number, since it is larger than the sum of its proper divisors (12103815).

18473145 is a wasteful number, since it uses less digits than its factorization.

18473145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42504.

The product of its digits is 13440, while the sum is 33.

The square root of 18473145 is about 4298.0396694307. The cubic root of 18473145 is about 264.3505873651.

The spelling of 18473145 in words is "eighteen million, four hundred seventy-three thousand, one hundred forty-five".