20242043135437 has 4 divisors (see below), whose sum is σ = 20735751504636. Its totient is φ = 19748334766240.

The previous prime is 20242043135429. The next prime is 20242043135449. The reversal of 20242043135437 is 73453134024202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4337747591076 + 15904295544361 = 2082726^2 + 3988019^2 .

It is a cyclic number.

It is not a de Polignac number, because 20242043135437 - 2³ = 20242043135429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20242043135437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20242043135497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246854184538 + ... + 246854184619.

It is an arithmetic number, because the mean of its divisors is an integer number (5183937876159).

Almost surely, 2^{20242043135437} is an apocalyptic number.

It is an amenable number.

20242043135437 is a deficient number, since it is larger than the sum of its proper divisors (493708369199).

20242043135437 is an equidigital number, since it uses as much as digits as its factorization.

20242043135437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493708369198.

The product of its (nonzero) digits is 483840, while the sum is 40.

Adding to 20242043135437 its reverse (73453134024202), we get a palindrome (93695177159639).

The spelling of 20242043135437 in words is "twenty trillion, two hundred forty-two billion, forty-three million, one hundred thirty-five thousand, four hundred thirty-seven".