20342030505 has 8 divisors (see below), whose sum is σ = 32547248832. Its totient is φ = 10849082928.

The previous prime is 20342030491. The next prime is 20342030509. The reversal of 20342030505 is 50503024302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20342030505 - 2¹¹ = 20342028457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20342030509) 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 7 ways as a sum of consecutive naturals, for example, 678067669 + ... + 678067698.

It is an arithmetic number, because the mean of its divisors is an integer number (4068406104).

Almost surely, 2^20342030505 is an apocalyptic number.

It is an amenable number.

20342030505 is a deficient number, since it is larger than the sum of its proper divisors (12205218327).

20342030505 is a wasteful number, since it uses less digits than its factorization.

20342030505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356135375.

The product of its (nonzero) digits is 3600, while the sum is 24.

Adding to 20342030505 its reverse (50503024302), we get a palindrome (70845054807).

The spelling of 20342030505 in words is "twenty billion, three hundred forty-two million, thirty thousand, five hundred five".