17994131 has 4 divisors (see below), whose sum is σ = 18009264. Its totient is φ = 17979000.

The previous prime is 17994127. The next prime is 17994139. The reversal of 17994131 is 13149971.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 17994131 - 2² = 17994127 is a prime.

It is a super-2 number, since 2×17994131² = 647577500890322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17994091 and 17994100.

It is not an unprimeable number, because it can be changed into a prime (17994139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5615 + ... + 8216.

It is an arithmetic number, because the mean of its divisors is an integer number (4502316).

Almost surely, 2^17994131 is an apocalyptic number.

17994131 is a deficient number, since it is larger than the sum of its proper divisors (15133).

17994131 is a wasteful number, since it uses less digits than its factorization.

17994131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15132.

The product of its digits is 6804, while the sum is 35.

The square root of 17994131 is about 4241.9489624464. The cubic root of 17994131 is about 262.0456527482.

The spelling of 17994131 in words is "seventeen million, nine hundred ninety-four thousand, one hundred thirty-one".