18673361 has 24 divisors (see below), whose sum is σ = 23823720. Its totient is φ = 14525952.

The previous prime is 18673349. The next prime is 18673379. The reversal of 18673361 is 16337681.

It can be written as a sum of positive squares in 4 ways, for example, as 1500625 + 17172736 = 1225^2 + 4144^2 .

It is not a de Polignac number, because 18673361 - 2⁶ = 18673297 is a prime.

It is a super-2 number, since 2×18673361² = 697388822072642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18673321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23771 + ... + 24543.

It is an arithmetic number, because the mean of its divisors is an integer number (992655).

Almost surely, 2^18673361 is an apocalyptic number.

It is an amenable number.

18673361 is a deficient number, since it is larger than the sum of its proper divisors (5150359).

18673361 is a wasteful number, since it uses less digits than its factorization.

18673361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 826 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 18673361 is about 4321.2684480370. The cubic root of 18673361 is about 265.3021876118.

The spelling of 18673361 in words is "eighteen million, six hundred seventy-three thousand, three hundred sixty-one".