18020366 has 16 divisors (see below), whose sum is σ = 33268704. Its totient is φ = 7128864.

The previous prime is 18020351. The next prime is 18020381. The reversal of 18020366 is 66302081.

It is an interprime number because it is at equal distance from previous prime (18020351) and next prime (18020381).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

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, 49325 + ... + 49688.

It is an arithmetic number, because the mean of its divisors is an integer number (2079294).

Almost surely, 2^18020366 is an apocalyptic number.

18020366 is a deficient number, since it is larger than the sum of its proper divisors (15248338).

18020366 is a wasteful number, since it uses less digits than its factorization.

18020366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99035.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 18020366 is about 4245.0401647099. The cubic root of 18020366 is about 262.1729429430.

The spelling of 18020366 in words is "eighteen million, twenty thousand, three hundred sixty-six".