18089951 has 8 divisors (see below), whose sum is σ = 19867008. Its totient is φ = 16335000.

The previous prime is 18089947. The next prime is 18089959. The reversal of 18089951 is 15998081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18089951 - 2² = 18089947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18089899 and 18089908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18089959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3785 + ... + 7106.

It is an arithmetic number, because the mean of its divisors is an integer number (2483376).

Almost surely, 2^18089951 is an apocalyptic number.

18089951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18089951 is a deficient number, since it is larger than the sum of its proper divisors (1777057).

18089951 is a wasteful number, since it uses less digits than its factorization.

18089951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11053.

The product of its (nonzero) digits is 25920, while the sum is 41.

The square root of 18089951 is about 4253.2283033009. The cubic root of 18089951 is about 262.5099666662.

The spelling of 18089951 in words is "eighteen million, eighty-nine thousand, nine hundred fifty-one".