18197286 has 16 divisors (see below), whose sum is σ = 36465984. Its totient is φ = 6053864.

The previous prime is 18197281. The next prime is 18197287. The reversal of 18197286 is 68279181.

It is a super-2 number, since 2×18197286² = 662282435531592, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18197281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685 + ... + 6071.

It is an arithmetic number, because the mean of its divisors is an integer number (2279124).

Almost surely, 2^18197286 is an apocalyptic number.

18197286 is an abundant number, since it is smaller than the sum of its proper divisors (18268698).

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

18197286 is a wasteful number, since it uses less digits than its factorization.

18197286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5955.

The product of its digits is 48384, while the sum is 42.

The square root of 18197286 is about 4265.8277039749. The cubic root of 18197286 is about 263.0281357997.

The spelling of 18197286 in words is "eighteen million, one hundred ninety-seven thousand, two hundred eighty-six".