18240196 has 48 divisors (see below), whose sum is σ = 36465408. Its totient is φ = 7920000.

The previous prime is 18240191. The next prime is 18240221. The reversal of 18240196 is 69104281.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18240191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120721 + ... + 120871.

It is an arithmetic number, because the mean of its divisors is an integer number (759696).

Almost surely, 2^18240196 is an apocalyptic number.

It is an amenable number.

18240196 is a deficient number, since it is larger than the sum of its proper divisors (18225212).

18240196 is a wasteful number, since it uses less digits than its factorization.

18240196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 18240196 is about 4270.8542471033. The cubic root of 18240196 is about 263.2347174758.

The spelling of 18240196 in words is "eighteen million, two hundred forty thousand, one hundred ninety-six".