22142443240 has 32 divisors (see below), whose sum is σ = 49845600000. Its totient is φ = 8852514624.

The previous prime is 22142443139. The next prime is 22142443243. The reversal of 22142443240 is 4234424122.

It is a junction number, because it is equal to n+sod(n) for n = 22142443199 and 22142443208.

It is not an unprimeable number, because it can be changed into a prime (22142443243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58500 + ... + 218419.

It is an arithmetic number, because the mean of its divisors is an integer number (1557675000).

Almost surely, 2^22142443240 is an apocalyptic number.

22142443240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22142443240 is an abundant number, since it is smaller than the sum of its proper divisors (27703156760).

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

22142443240 is a wasteful number, since it uses less digits than its factorization.

22142443240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278929 (or 278925 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 22142443240 its reverse (4234424122), we get a palindrome (26376867362).

The spelling of 22142443240 in words is "twenty-two billion, one hundred forty-two million, four hundred forty-three thousand, two hundred forty".