18063873 has 6 divisors (see below), whose sum is σ = 26092274. Its totient is φ = 12042576.

The previous prime is 18063863. The next prime is 18063883. The reversal of 18063873 is 37836081.

18063873 is a `hidden beast` number, since 18 + 0 + 638 + 7 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (18063863) and next prime (18063883).

It can be written as a sum of positive squares in only one way, i.e., 12027024 + 6036849 = 3468^2 + 2457^2 .

It is not a de Polignac number, because 18063873 - 2⁹ = 18063361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18063833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1003540 + ... + 1003557.

Almost surely, 2^18063873 is an apocalyptic number.

It is an amenable number.

18063873 is a deficient number, since it is larger than the sum of its proper divisors (8028401).

18063873 is a wasteful number, since it uses less digits than its factorization.

18063873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007103 (or 2007100 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 18063873 is about 4250.1615263423. The cubic root of 18063873 is about 262.3837635034.

The spelling of 18063873 in words is "eighteen million, sixty-three thousand, eight hundred seventy-three".