18182021822 has 4 divisors (see below), whose sum is σ = 27273032736. Its totient is φ = 9091010910.

The previous prime is 18182021813. The next prime is 18182021833. The reversal of 18182021822 is 22812028181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22812028181 = 617 ⋅36972493.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4545505454 + ... + 4545505457.

It is an arithmetic number, because the mean of its divisors is an integer number (6818258184).

Almost surely, 2^18182021822 is an apocalyptic number.

18182021822 is a deficient number, since it is larger than the sum of its proper divisors (9091010914).

18182021822 is an equidigital number, since it uses as much as digits as its factorization.

18182021822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9091010913.

The product of its (nonzero) digits is 8192, while the sum is 35.

The spelling of 18182021822 in words is "eighteen billion, one hundred eighty-two million, twenty-one thousand, eight hundred twenty-two".