18089913 has 8 divisors (see below), whose sum is σ = 24170976. Its totient is φ = 12034400.

The previous prime is 18089909. The next prime is 18089917. The reversal of 18089913 is 31998081.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18089909) and next prime (18089917).

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 18089913 - 2² = 18089909 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18089917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4668 + ... + 7613.

It is an arithmetic number, because the mean of its divisors is an integer number (3021372).

Almost surely, 2^18089913 is an apocalyptic number.

It is an amenable number.

18089913 is a deficient number, since it is larger than the sum of its proper divisors (6081063).

18089913 is a wasteful number, since it uses less digits than its factorization.

18089913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12775.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 18089913 is about 4253.2238361036. The cubic root of 18089913 is about 262.5097828554.

The spelling of 18089913 in words is "eighteen million, eighty-nine thousand, nine hundred thirteen".