18019822 has 8 divisors (see below), whose sum is σ = 27158472. Its totient is φ = 8967000.

The previous prime is 18019819. The next prime is 18019823. The reversal of 18019822 is 22891081.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18019823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20929 + ... + 21772.

It is an arithmetic number, because the mean of its divisors is an integer number (3394809).

Almost surely, 2^18019822 is an apocalyptic number.

18019822 is a deficient number, since it is larger than the sum of its proper divisors (9138650).

18019822 is a wasteful number, since it uses less digits than its factorization.

18019822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42914.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 18019822 is about 4244.9760894497. The cubic root of 18019822 is about 262.1703047518.

It can be divided in two parts, 180 and 19822, that added together give a palindrome (20002).

The spelling of 18019822 in words is "eighteen million, nineteen thousand, eight hundred twenty-two".