20242120005 has 12 divisors (see below), whose sum is σ = 35086341420. Its totient is φ = 10795797312.

The previous prime is 20242119991. The next prime is 20242120009. The reversal of 20242120005 is 50002124202.

It can be written as a sum of positive squares in 2 ways, for example, as 6956560836 + 13285559169 = 83406^2 + 115263^2 .

It is not a de Polignac number, because 20242120005 - 2²⁴ = 20225342789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20242120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20242120009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224912400 + ... + 224912489.

It is an arithmetic number, because the mean of its divisors is an integer number (2923861785).

Almost surely, 2^20242120005 is an apocalyptic number.

It is an amenable number.

20242120005 is a deficient number, since it is larger than the sum of its proper divisors (14844221415).

20242120005 is a wasteful number, since it uses less digits than its factorization.

20242120005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449824900 (or 449824897 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

Adding to 20242120005 its reverse (50002124202), we get a palindrome (70244244207).

The spelling of 20242120005 in words is "twenty billion, two hundred forty-two million, one hundred twenty thousand, five".