18140190 has 32 divisors (see below), whose sum is σ = 46098720. Its totient is φ = 4552704.

The previous prime is 18140189. The next prime is 18140191. The reversal of 18140190 is 9104181.

It is an interprime number because it is at equal distance from previous prime (18140189) and next prime (18140191).

It is a super-2 number, since 2×18140190² = 658132986472200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18140190.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18140191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17275 + ... + 18294.

It is an arithmetic number, because the mean of its divisors is an integer number (1440585).

Almost surely, 2^18140190 is an apocalyptic number.

18140190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18140190 is an abundant number, since it is smaller than the sum of its proper divisors (27958530).

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

18140190 is a wasteful number, since it uses less digits than its factorization.

18140190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35596.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 18140190 is about 4259.1301928915. The cubic root of 18140190 is about 262.7527542839.

The spelling of 18140190 in words is "eighteen million, one hundred forty thousand, one hundred ninety".