20444413018 has 8 divisors (see below), whose sum is σ = 30757619412. Its totient is φ = 10191873216.

The previous prime is 20444413013. The next prime is 20444413019. The reversal of 20444413018 is 81031444402.

It can be written as a sum of positive squares in 2 ways, for example, as 20134758609 + 309654409 = 141897^2 + 17597^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20444413013) 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 3 ways as a sum of consecutive naturals, for example, 15165805 + ... + 15167152.

Almost surely, 2^20444413018 is an apocalyptic number.

20444413018 is a deficient number, since it is larger than the sum of its proper divisors (10313206394).

20444413018 is a wasteful number, since it uses less digits than its factorization.

20444413018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30333296.

The product of its (nonzero) digits is 12288, while the sum is 31.

The spelling of 20444413018 in words is "twenty billion, four hundred forty-four million, four hundred thirteen thousand, eighteen".