20442122340 has 48 divisors (see below), whose sum is σ = 57247169280. Its totient is φ = 5450353920.

The previous prime is 20442122333. The next prime is 20442122347. The reversal of 20442122340 is 4322124402.

It is an interprime number because it is at equal distance from previous prime (20442122333) and next prime (20442122347).

It is a self number, because there is not a number n which added to its sum of digits gives 20442122340.

It is not an unprimeable number, because it can be changed into a prime (20442122347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403845 + ... + 451635.

It is an arithmetic number, because the mean of its divisors is an integer number (1192649360).

Almost surely, 2^20442122340 is an apocalyptic number.

20442122340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20442122340 is an abundant number, since it is smaller than the sum of its proper divisors (36805046940).

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

20442122340 is a wasteful number, since it uses less digits than its factorization.

20442122340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54932 (or 54930 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20442122340 its reverse (4322124402), we get a palindrome (24764246742).

The spelling of 20442122340 in words is "twenty billion, four hundred forty-two million, one hundred twenty-two thousand, three hundred forty".