18072194 has 16 divisors (see below), whose sum is σ = 31981056. Its totient is φ = 7495200.

The previous prime is 18072161. The next prime is 18072209. The reversal of 18072194 is 49127081.

It is a self number, because there is not a number n which added to its sum of digits gives 18072194.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20387 + ... + 21254.

It is an arithmetic number, because the mean of its divisors is an integer number (1998816).

Almost surely, 2^18072194 is an apocalyptic number.

18072194 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18072194 is a deficient number, since it is larger than the sum of its proper divisors (13908862).

18072194 is a wasteful number, since it uses less digits than its factorization.

18072194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41681.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 18072194 is about 4251.1403176089. The cubic root of 18072194 is about 262.4240457497.

The spelling of 18072194 in words is "eighteen million, seventy-two thousand, one hundred ninety-four".