18021334 has 4 divisors (see below), whose sum is σ = 27032004. Its totient is φ = 9010666.

The previous prime is 18021319. The next prime is 18021337. The reversal of 18021334 is 43312081.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18021337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4505332 + ... + 4505335.

It is an arithmetic number, because the mean of its divisors is an integer number (6758001).

Almost surely, 2^18021334 is an apocalyptic number.

18021334 is a deficient number, since it is larger than the sum of its proper divisors (9010670).

18021334 is an equidigital number, since it uses as much as digits as its factorization.

18021334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9010669.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 18021334 is about 4245.1541785900. The cubic root of 18021334 is about 262.1776372403.

It can be divided in two parts, 1802 and 1334, that added together give a square (3136 = 56²).

The spelling of 18021334 in words is "eighteen million, twenty-one thousand, three hundred thirty-four".