20124430243 has 8 divisors (see below), whose sum is σ = 20589940800. Its totient is φ = 19662097728.

The previous prime is 20124430229. The next prime is 20124430253. The reversal of 20124430243 is 34203442102.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-20124430243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20124430213) 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 7 ways as a sum of consecutive naturals, for example, 781698 + ... + 807031.

It is an arithmetic number, because the mean of its divisors is an integer number (2573742600).

Almost surely, 2^20124430243 is an apocalyptic number.

20124430243 is a deficient number, since it is larger than the sum of its proper divisors (465510557).

20124430243 is a wasteful number, since it uses less digits than its factorization.

20124430243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589021.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20124430243 its reverse (34203442102), we get a palindrome (54327872345).

The spelling of 20124430243 in words is "twenty billion, one hundred twenty-four million, four hundred thirty thousand, two hundred forty-three".