20124163811 has 4 divisors (see below), whose sum is σ = 20129041800. Its totient is φ = 20119285824.

The previous prime is 20124163799. The next prime is 20124163837. The reversal of 20124163811 is 11836142102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20124163811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20124165811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2432801 + ... + 2441058.

It is an arithmetic number, because the mean of its divisors is an integer number (5032260450).

Almost surely, 2^20124163811 is an apocalyptic number.

20124163811 is a deficient number, since it is larger than the sum of its proper divisors (4877989).

20124163811 is an equidigital number, since it uses as much as digits as its factorization.

20124163811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4877988.

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 20124163811 in words is "twenty billion, one hundred twenty-four million, one hundred sixty-three thousand, eight hundred eleven".