18109726 has 8 divisors (see below), whose sum is σ = 28762560. Its totient is φ = 8522208.

The previous prime is 18109703. The next prime is 18109727. The reversal of 18109726 is 62790181.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 532639 = 18109726 / (1 + 8 + 1 + 0 + 9 + 7 + 2 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 18109691 and 18109700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18109727) 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 3 ways as a sum of consecutive naturals, for example, 266286 + ... + 266353.

It is an arithmetic number, because the mean of its divisors is an integer number (3595320).

Almost surely, 2^18109726 is an apocalyptic number.

18109726 is a deficient number, since it is larger than the sum of its proper divisors (10652834).

18109726 is a wasteful number, since it uses less digits than its factorization.

18109726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532658.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 18109726 is about 4255.5523730768. The cubic root of 18109726 is about 262.6055859445.

The spelling of 18109726 in words is "eighteen million, one hundred nine thousand, seven hundred twenty-six".