22000018 has 8 divisors (see below), whose sum is σ = 34064640. Its totient is φ = 10645140.

The previous prime is 22000003. The next prime is 22000021. The reversal of 22000018 is 81000022.

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 = 21999971 and 22000007.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 177358 + ... + 177481.

It is an arithmetic number, because the mean of its divisors is an integer number (4258080).

Almost surely, 2^22000018 is an apocalyptic number.

22000018 is a deficient number, since it is larger than the sum of its proper divisors (12064622).

22000018 is a wasteful number, since it uses less digits than its factorization.

22000018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354872.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 22000018 is about 4690.4176786295. The cubic root of 22000018 is about 280.2040094848.

The spelling of 22000018 in words is "twenty-two million, eighteen", and thus it is an aban number and an uban number.