22123140 has 96 divisors (see below), whose sum is σ = 67568256. Its totient is φ = 5376000.

The previous prime is 22123133. The next prime is 22123169. The reversal of 22123140 is 4132122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88015 + ... + 88265.

It is an arithmetic number, because the mean of its divisors is an integer number (703836).

Almost surely, 2^22123140 is an apocalyptic number.

22123140 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 22123140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33784128).

22123140 is an abundant number, since it is smaller than the sum of its proper divisors (45445116).

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

22123140 is a wasteful number, since it uses less digits than its factorization.

22123140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 22123140 is about 4703.5242106319. The cubic root of 22123140 is about 280.7257532940.

Adding to 22123140 its reverse (4132122), we get a palindrome (26255262).

The spelling of 22123140 in words is "twenty-two million, one hundred twenty-three thousand, one hundred forty".