20222121342340 has 24 divisors (see below), whose sum is σ = 43162626211992. Its totient is φ = 7956244462080.

The previous prime is 20222121342329. The next prime is 20222121342373. The reversal of 20222121342340 is 4324312122202.

It can be written as a sum of positive squares in 4 ways, for example, as 32124826756 + 20189996515584 = 179234^2 + 4493328^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20222121342299 and 20222121342308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8287753429 + ... + 8287755868.

It is an arithmetic number, because the mean of its divisors is an integer number (1798442758833).

Almost surely, 2^{20222121342340} is an apocalyptic number.

20222121342340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20222121342340 is an abundant number, since it is smaller than the sum of its proper divisors (22940504869652).

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

20222121342340 is a wasteful number, since it uses less digits than its factorization.

20222121342340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16575509367 (or 16575509365 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20222121342340 its reverse (4324312122202), we get a palindrome (24546433464542).

The spelling of 20222121342340 in words is "twenty trillion, two hundred twenty-two billion, one hundred twenty-one million, three hundred forty-two thousand, three hundred forty".