18006473 has 8 divisors (see below), whose sum is σ = 18275400. Its totient is φ = 17739648.

The previous prime is 18006431. The next prime is 18006479. The reversal of 18006473 is 37460081.

It can be written as a sum of positive squares in 4 ways, for example, as 299209 + 17707264 = 547^2 + 4208^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18006473 - 2²⁴ = 1229257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18006479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25043 + ... + 25751.

It is an arithmetic number, because the mean of its divisors is an integer number (2284425).

Almost surely, 2^18006473 is an apocalyptic number.

It is an amenable number.

18006473 is a deficient number, since it is larger than the sum of its proper divisors (268927).

18006473 is a wasteful number, since it uses less digits than its factorization.

18006473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 18006473 is about 4243.4034689150. The cubic root of 18006473 is about 262.1055505801.

The spelling of 18006473 in words is "eighteen million, six thousand, four hundred seventy-three".