22018122 has 64 divisors (see below), whose sum is σ = 57753600. Its totient is φ = 6084720.

The previous prime is 22018103. The next prime is 22018123. The reversal of 22018122 is 22181022.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22018095 and 22018104.

It is not an unprimeable number, because it can be changed into a prime (22018123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10779 + ... + 12657.

It is an arithmetic number, because the mean of its divisors is an integer number (902400).

Almost surely, 2^22018122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22018122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28876800).

22018122 is an abundant number, since it is smaller than the sum of its proper divisors (35735478).

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

22018122 is a wasteful number, since it uses less digits than its factorization.

22018122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928 (or 1922 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 22018122 is about 4692.3471738566. The cubic root of 22018122 is about 280.2808491573.

Adding to 22018122 its reverse (22181022), we get a palindrome (44199144).

The spelling of 22018122 in words is "twenty-two million, eighteen thousand, one hundred twenty-two".