22431122340 has 96 divisors (see below), whose sum is σ = 69017284224. Its totient is φ = 5398133760.

The previous prime is 22431122339. The next prime is 22431122341. The reversal of 22431122340 is 4322113422.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22431122339) and next prime (22431122341).

It is a self number, because there is not a number n which added to its sum of digits gives 22431122340.

It is not an unprimeable number, because it can be changed into a prime (22431122341) 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, 33619 + ... + 214458.

It is an arithmetic number, because the mean of its divisors is an integer number (718930044).

Almost surely, 2^22431122340 is an apocalyptic number.

22431122340 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 22431122340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34508642112).

22431122340 is an abundant number, since it is smaller than the sum of its proper divisors (46586161884).

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

22431122340 is a wasteful number, since it uses less digits than its factorization.

22431122340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248237 (or 248235 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 22431122340 its reverse (4322113422), we get a palindrome (26753235762).

The spelling of 22431122340 in words is "twenty-two billion, four hundred thirty-one million, one hundred twenty-two thousand, three hundred forty".