18130726 has 4 divisors (see below), whose sum is σ = 27196092. Its totient is φ = 9065362.

The previous prime is 18130681. The next prime is 18130727. The reversal of 18130726 is 62703181.

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

It is a junction number, because it is equal to n+sod(n) for n = 18130694 and 18130703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18130727) 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 as a sum of consecutive naturals, namely, 4532680 + ... + 4532683.

It is an arithmetic number, because the mean of its divisors is an integer number (6799023).

Almost surely, 2^18130726 is an apocalyptic number.

18130726 is a deficient number, since it is larger than the sum of its proper divisors (9065366).

18130726 is an equidigital number, since it uses as much as digits as its factorization.

18130726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9065365.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 18130726 is about 4258.0190229730. The cubic root of 18130726 is about 262.7070523620.

The spelling of 18130726 in words is "eighteen million, one hundred thirty thousand, seven hundred twenty-six".