18401822 has 8 divisors (see below), whose sum is σ = 27621000. Its totient is φ = 9194824.

The previous prime is 18401821. The next prime is 18401827. The reversal of 18401822 is 22810481.

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

It is a junction number, because it is equal to n+sod(n) for n = 18401791 and 18401800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18401821) 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 3 ways as a sum of consecutive naturals, for example, 3929 + ... + 7227.

It is an arithmetic number, because the mean of its divisors is an integer number (3452625).

Almost surely, 2^18401822 is an apocalyptic number.

18401822 is a deficient number, since it is larger than the sum of its proper divisors (9219178).

18401822 is a wasteful number, since it uses less digits than its factorization.

18401822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6090.

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 18401822 is about 4289.7344906183. The cubic root of 18401822 is about 264.0099380250.

The spelling of 18401822 in words is "eighteen million, four hundred one thousand, eight hundred twenty-two".