18220382 has 16 divisors (see below), whose sum is σ = 27907200. Its totient is φ = 8919768.

The previous prime is 18220361. The next prime is 18220387. The reversal of 18220382 is 28302281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18220387) by changing a digit.

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, 30119 + ... + 30717.

It is an arithmetic number, because the mean of its divisors is an integer number (1744200).

Almost surely, 2^18220382 is an apocalyptic number.

18220382 is a deficient number, since it is larger than the sum of its proper divisors (9686818).

18220382 is a wasteful number, since it uses less digits than its factorization.

18220382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 18220382 is about 4268.5339403594. The cubic root of 18220382 is about 263.1393672135.

The spelling of 18220382 in words is "eighteen million, two hundred twenty thousand, three hundred eighty-two".