22124431240 has 128 divisors (see below), whose sum is σ = 51616051200. Its totient is φ = 8531066880.

The previous prime is 22124431229. The next prime is 22124431253. The reversal of 22124431240 is 4213442122.

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, 29072460 + ... + 29073220.

It is an arithmetic number, because the mean of its divisors is an integer number (403250400).

Almost surely, 2^22124431240 is an apocalyptic number.

22124431240 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 22124431240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25808025600).

22124431240 is an abundant number, since it is smaller than the sum of its proper divisors (29491619960).

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

22124431240 is a wasteful number, since it uses less digits than its factorization.

22124431240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055 (or 1051 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 22124431240 its reverse (4213442122), we get a palindrome (26337873362).

The spelling of 22124431240 in words is "twenty-two billion, one hundred twenty-four million, four hundred thirty-one thousand, two hundred forty".