20044043345 has 4 divisors (see below), whose sum is σ = 24052852020. Its totient is φ = 16035234672.

The previous prime is 20044043339. The next prime is 20044043363. The reversal of 20044043345 is 54334044002.

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 12924733969 + 7119309376 = 113687^2 + 84376^2 .

It is a cyclic number.

It is not a de Polignac number, because 20044043345 - 2⁶ = 20044043281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2004404330 + ... + 2004404339.

It is an arithmetic number, because the mean of its divisors is an integer number (6013213005).

Almost surely, 2^20044043345 is an apocalyptic number.

It is an amenable number.

20044043345 is a deficient number, since it is larger than the sum of its proper divisors (4008808675).

20044043345 is an equidigital number, since it uses as much as digits as its factorization.

20044043345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4008808674.

The product of its (nonzero) digits is 23040, while the sum is 29.

Adding to 20044043345 its reverse (54334044002), we get a palindrome (74378087347).

The spelling of 20044043345 in words is "twenty billion, forty-four million, forty-three thousand, three hundred forty-five".