22042120340 has 96 divisors (see below), whose sum is σ = 48716881920. Its totient is φ = 8366198400.

The previous prime is 22042120319. The next prime is 22042120349. The reversal of 22042120340 is 4302124022.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22042120349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27178535 + ... + 27179345.

It is an arithmetic number, because the mean of its divisors is an integer number (507467520).

Almost surely, 2^22042120340 is an apocalyptic number.

22042120340 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 22042120340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24358440960).

22042120340 is an abundant number, since it is smaller than the sum of its proper divisors (26674761580).

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

22042120340 is a wasteful number, since it uses less digits than its factorization.

22042120340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653 (or 1651 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 22042120340 its reverse (4302124022), we get a palindrome (26344244362).

The spelling of 22042120340 in words is "twenty-two billion, forty-two million, one hundred twenty thousand, three hundred forty".