18195982 has 16 divisors (see below), whose sum is σ = 31328352. Its totient is φ = 7764480.

The previous prime is 18195937. The next prime is 18196019. The reversal of 18195982 is 28959181.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 678 + ... + 6070.

It is an arithmetic number, because the mean of its divisors is an integer number (1958022).

Almost surely, 2^18195982 is an apocalyptic number.

18195982 is a deficient number, since it is larger than the sum of its proper divisors (13132370).

18195982 is a wasteful number, since it uses less digits than its factorization.

18195982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5643.

The product of its digits is 51840, while the sum is 43.

The square root of 18195982 is about 4265.6748586830. The cubic root of 18195982 is about 263.0218528686.

The spelling of 18195982 in words is "eighteen million, one hundred ninety-five thousand, nine hundred eighty-two".