18006373 has 18 divisors (see below), whose sum is σ = 23031078. Its totient is φ = 14026320.

The previous prime is 18006371. The next prime is 18006377. The reversal of 18006373 is 37360081.

It can be written as a sum of positive squares in only one way, i.e., 17288964 + 717409 = 4158^2 + 847^2 .

It is not a de Polignac number, because 18006373 - 2¹ = 18006371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18006371) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4411 + ... + 7447.

Almost surely, 2^18006373 is an apocalyptic number.

It is an amenable number.

18006373 is a deficient number, since it is larger than the sum of its proper divisors (5024705).

18006373 is a wasteful number, since it uses less digits than its factorization.

18006373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3073 (or 3055 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 18006373 is about 4243.3916859041. The cubic root of 18006373 is about 262.1050653730.

The spelling of 18006373 in words is "eighteen million, six thousand, three hundred seventy-three".