18195190 has 32 divisors (see below), whose sum is σ = 35814240. Its totient is φ = 6614784.

The previous prime is 18195173. The next prime is 18195193. The reversal of 18195190 is 9159181.

It is a super-2 number, since 2×18195190² = 662129878272200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18195193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7666 + ... + 9754.

It is an arithmetic number, because the mean of its divisors is an integer number (1119195).

Almost surely, 2^18195190 is an apocalyptic number.

18195190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18195190 is a deficient number, since it is larger than the sum of its proper divisors (17619050).

18195190 is a wasteful number, since it uses less digits than its factorization.

18195190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2176.

The product of its (nonzero) digits is 3240, while the sum is 34.

The square root of 18195190 is about 4265.5820235930. The cubic root of 18195190 is about 263.0180367087.

The spelling of 18195190 in words is "eighteen million, one hundred ninety-five thousand, one hundred ninety".