18212822 has 8 divisors (see below), whose sum is σ = 27954696. Its totient is φ = 8894592.

The previous prime is 18212807. The next prime is 18212827. The reversal of 18212822 is 22821281.

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 = 18212791 and 18212800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18212827) 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, 105803 + ... + 105974.

It is an arithmetic number, because the mean of its divisors is an integer number (3494337).

Almost surely, 2^18212822 is an apocalyptic number.

18212822 is a deficient number, since it is larger than the sum of its proper divisors (9741874).

18212822 is a wasteful number, since it uses less digits than its factorization.

18212822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211822.

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

The square root of 18212822 is about 4267.6482985363. The cubic root of 18212822 is about 263.1029682544.

The spelling of 18212822 in words is "eighteen million, two hundred twelve thousand, eight hundred twenty-two".