18009126 has 12 divisors (see below), whose sum is σ = 39019812. Its totient is φ = 6003036.

The previous prime is 18009119. The next prime is 18009133. The reversal of 18009126 is 62190081.

It is an interprime number because it is at equal distance from previous prime (18009119) and next prime (18009133).

It is a self number, because there is not a number n which added to its sum of digits gives 18009126.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 500236 + ... + 500271.

It is an arithmetic number, because the mean of its divisors is an integer number (3251651).

Almost surely, 2^18009126 is an apocalyptic number.

18009126 is an abundant number, since it is smaller than the sum of its proper divisors (21010686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18009126 is a wasteful number, since it uses less digits than its factorization.

18009126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000515 (or 1000512 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 18009126 is about 4243.7160602472. The cubic root of 18009126 is about 262.1184224675.

The spelling of 18009126 in words is "eighteen million, nine thousand, one hundred twenty-six".