22194018 has 96 divisors (see below), whose sum is σ = 61102080. Its totient is φ = 5654880.

The previous prime is 22194013. The next prime is 22194113. The reversal of 22194018 is 81049122.

It is a junction number, because it is equal to n+sod(n) for n = 22193982 and 22194000.

It is not an unprimeable number, because it can be changed into a prime (22194013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92743 + ... + 92981.

It is an arithmetic number, because the mean of its divisors is an integer number (636480).

Almost surely, 2^22194018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22194018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30551040).

22194018 is an abundant number, since it is smaller than the sum of its proper divisors (38908062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22194018 is a wasteful number, since it uses less digits than its factorization.

22194018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 22194018 is about 4711.0527485903. The cubic root of 22194018 is about 281.0252296002.

The spelling of 22194018 in words is "twenty-two million, one hundred ninety-four thousand, eighteen".