20004447331 has 24 divisors (see below), whose sum is σ = 23275425600. Its totient is φ = 17132108400.

The previous prime is 20004447329. The next prime is 20004447367. The reversal of 20004447331 is 13374440002.

It is not a de Polignac number, because 20004447331 - 2¹ = 20004447329 is a prime.

It is a super-2 number, since 2×20004447331² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20004447331.

It is not an unprimeable number, because it can be changed into a prime (20004447131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 387216 + ... + 435826.

It is an arithmetic number, because the mean of its divisors is an integer number (969809400).

Almost surely, 2^20004447331 is an apocalyptic number.

20004447331 is a deficient number, since it is larger than the sum of its proper divisors (3270978269).

20004447331 is a wasteful number, since it uses less digits than its factorization.

20004447331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48831 (or 48820 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

Adding to 20004447331 its reverse (13374440002), we get a palindrome (33378887333).

The spelling of 20004447331 in words is "twenty billion, four million, four hundred forty-seven thousand, three hundred thirty-one".