18381082 has 16 divisors (see below), whose sum is σ = 28536480. Its totient is φ = 8872848.

The previous prime is 18381059. The next prime is 18381107. The reversal of 18381082 is 28018381.

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, 9393 + ... + 11179.

It is an arithmetic number, because the mean of its divisors is an integer number (1783530).

Almost surely, 2^18381082 is an apocalyptic number.

18381082 is a deficient number, since it is larger than the sum of its proper divisors (10155398).

18381082 is a wasteful number, since it uses less digits than its factorization.

18381082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 18381082 is about 4287.3164100635. The cubic root of 18381082 is about 263.9107155222.

The spelling of 18381082 in words is "eighteen million, three hundred eighty-one thousand, eighty-two".