18118726 has 4 divisors (see below), whose sum is σ = 27178092. Its totient is φ = 9059362.

The previous prime is 18118721. The next prime is 18118777. The reversal of 18118726 is 62781181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62781181 = 173 ⋅362897.

It is a junction number, because it is equal to n+sod(n) for n = 18118691 and 18118700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18118721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4529680 + ... + 4529683.

It is an arithmetic number, because the mean of its divisors is an integer number (6794523).

Almost surely, 2^18118726 is an apocalyptic number.

18118726 is a deficient number, since it is larger than the sum of its proper divisors (9059366).

18118726 is an equidigital number, since it uses as much as digits as its factorization.

18118726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9059365.

The product of its digits is 5376, while the sum is 34.

The square root of 18118726 is about 4256.6096837742. The cubic root of 18118726 is about 262.6490811518.

The spelling of 18118726 in words is "eighteen million, one hundred eighteen thousand, seven hundred twenty-six".