20244813385 has 4 divisors (see below), whose sum is σ = 24293776068. Its totient is φ = 16195850704.

The previous prime is 20244813353. The next prime is 20244813389. The reversal of 20244813385 is 58331844202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7325990464 + 12918822921 = 85592^2 + 113661^2 .

It is a cyclic number.

It is not a de Polignac number, because 20244813385 - 2⁵ = 20244813353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20244813389) 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 3 ways as a sum of consecutive naturals, for example, 2024481334 + ... + 2024481343.

It is an arithmetic number, because the mean of its divisors is an integer number (6073444017).

Almost surely, 2^20244813385 is an apocalyptic number.

It is an amenable number.

20244813385 is a deficient number, since it is larger than the sum of its proper divisors (4048962683).

20244813385 is an equidigital number, since it uses as much as digits as its factorization.

20244813385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048962682.

The product of its (nonzero) digits is 184320, while the sum is 40.

The spelling of 20244813385 in words is "twenty billion, two hundred forty-four million, eight hundred thirteen thousand, three hundred eighty-five".