20022218 has 8 divisors (see below), whose sum is σ = 31002240. Its totient is φ = 9688140.

The previous prime is 20022203. The next prime is 20022229. The reversal of 20022218 is 81222002.

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 = 20022196 and 20022205.

It is an unprimeable number.

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, 161408 + ... + 161531.

It is an arithmetic number, because the mean of its divisors is an integer number (3875280).

Almost surely, 2^20022218 is an apocalyptic number.

20022218 is a deficient number, since it is larger than the sum of its proper divisors (10980022).

20022218 is a wasteful number, since it uses less digits than its factorization.

20022218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322972.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 20022218 is about 4474.6193134165. The cubic root of 20022218 is about 271.5422393461.

The spelling of 20022218 in words is "twenty million, twenty-two thousand, two hundred eighteen".