20424030243 has 16 divisors (see below), whose sum is σ = 27280903680. Its totient is φ = 13591615136.

The previous prime is 20424030223. The next prime is 20424030251. The reversal of 20424030243 is 34203042402.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20424030243 is a prime.

It is a super-2 number, since 2×20424030243² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20424030223) 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 15 ways as a sum of consecutive naturals, for example, 5005078 + ... + 5009156.

It is an arithmetic number, because the mean of its divisors is an integer number (1705056480).

Almost surely, 2^20424030243 is an apocalyptic number.

20424030243 is a deficient number, since it is larger than the sum of its proper divisors (6856873437).

20424030243 is a wasteful number, since it uses less digits than its factorization.

20424030243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6666.

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 20424030243 its reverse (34203042402), we get a palindrome (54627072645).

The spelling of 20424030243 in words is "twenty billion, four hundred twenty-four million, thirty thousand, two hundred forty-three".