22118040 has 192 divisors, whose sum is σ = 84015360. Its totient is φ = 4942080.

The previous prime is 22118029. The next prime is 22118053. The reversal of 22118040 is 4081122.

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

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 168775 + ... + 168905.

It is an arithmetic number, because the mean of its divisors is an integer number (437580).

Almost surely, 2^22118040 is an apocalyptic number.

22118040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22118040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42007680).

22118040 is an abundant number, since it is smaller than the sum of its proper divisors (61897320).

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

22118040 is a wasteful number, since it uses less digits than its factorization.

22118040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 215 counting only the distinct ones).

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

The square root of 22118040 is about 4702.9820327107. The cubic root of 22118040 is about 280.7041799343.

Adding to 22118040 its reverse (4081122), we get a palindrome (26199162).

The spelling of 22118040 in words is "twenty-two million, one hundred eighteen thousand, forty".