18081290 has 16 divisors (see below), whose sum is σ = 33033312. Its totient is φ = 7124304.

The previous prime is 18081253. The next prime is 18081307. The reversal of 18081290 is 9218081.

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, 12824 + ... + 14163.

It is an arithmetic number, because the mean of its divisors is an integer number (2064582).

Almost surely, 2^18081290 is an apocalyptic number.

18081290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18081290 is a deficient number, since it is larger than the sum of its proper divisors (14952022).

18081290 is a wasteful number, since it uses less digits than its factorization.

18081290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27061.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 18081290 is about 4252.2100136282. The cubic root of 18081290 is about 262.4680656541.

The spelling of 18081290 in words is "eighteen million, eighty-one thousand, two hundred ninety".