20542323307 has 18 divisors (see below), whose sum is σ = 23116318764. Its totient is φ = 18231360840.

The previous prime is 20542323253. The next prime is 20542323317. The reversal of 20542323307 is 70332324502.

It is a happy number.

It is not a de Polignac number, because 20542323307 - 2¹¹ = 20542321259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20542323317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10337368 + ... + 10339354.

Almost surely, 2^20542323307 is an apocalyptic number.

20542323307 is a deficient number, since it is larger than the sum of its proper divisors (2573995457).

20542323307 is an frugal number, since it uses more digits than its factorization.

20542323307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4039 (or 2041 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 31.

Adding to 20542323307 its reverse (70332324502), we get a palindrome (90874647809).

The spelling of 20542323307 in words is "twenty billion, five hundred forty-two million, three hundred twenty-three thousand, three hundred seven".