20044331999 has 4 divisors (see below), whose sum is σ = 20080976664. Its totient is φ = 20007687336.

The previous prime is 20044331987. The next prime is 20044332013. The reversal of 20044331999 is 99913344002.

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

It is a cyclic number.

It is not a de Polignac number, because 20044331999 - 2⁸ = 20044331743 is a prime.

It is a super-2 number, since 2×20044331999² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20044331399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18321512 + ... + 18322605.

It is an arithmetic number, because the mean of its divisors is an integer number (5020244166).

Almost surely, 2^20044331999 is an apocalyptic number.

20044331999 is a deficient number, since it is larger than the sum of its proper divisors (36644665).

20044331999 is an equidigital number, since it uses as much as digits as its factorization.

20044331999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36644664.

The product of its (nonzero) digits is 209952, while the sum is 44.

The spelling of 20044331999 in words is "twenty billion, forty-four million, three hundred thirty-one thousand, nine hundred ninety-nine".