18097426 has 12 divisors (see below), whose sum is σ = 27451098. Its totient is φ = 8947712.

The previous prime is 18097423. The next prime is 18097439. The reversal of 18097426 is 62479081.

It can be written as a sum of positive squares in 3 ways, for example, as 16394401 + 1703025 = 4049^2 + 1305^2 .

It is not an unprimeable number, because it can be changed into a prime (18097423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70290 + ... + 70546.

Almost surely, 2^18097426 is an apocalyptic number.

18097426 is a deficient number, since it is larger than the sum of its proper divisors (9353672).

18097426 is an equidigital number, since it uses as much as digits as its factorization.

18097426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 18097426 is about 4254.1069568124. The cubic root of 18097426 is about 262.5461191832.

The spelling of 18097426 in words is "eighteen million, ninety-seven thousand, four hundred twenty-six".