18389822 has 12 divisors (see below), whose sum is σ = 30320808. Its totient is φ = 8358900.

The previous prime is 18389821. The next prime is 18389879. The reversal of 18389822 is 22898381.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18389822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18389821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37754 + ... + 38237.

It is an arithmetic number, because the mean of its divisors is an integer number (2526734).

Almost surely, 2^18389822 is an apocalyptic number.

18389822 is a deficient number, since it is larger than the sum of its proper divisors (11930986).

18389822 is a wasteful number, since it uses less digits than its factorization.

18389822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76015 (or 76004 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The square root of 18389822 is about 4288.3355745557. The cubic root of 18389822 is about 263.9525377640.

The spelling of 18389822 in words is "eighteen million, three hundred eighty-nine thousand, eight hundred twenty-two".