20331031044 has 48 divisors (see below), whose sum is σ = 49101433920. Its totient is φ = 6539783040.

The previous prime is 20331031043. The next prime is 20331031057. The reversal of 20331031044 is 44013013302.

It is a self number, because there is not a number n which added to its sum of digits gives 20331031044.

It is not an unprimeable number, because it can be changed into a prime (20331031043) 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 15 ways as a sum of consecutive naturals, for example, 671799 + ... + 701409.

It is an arithmetic number, because the mean of its divisors is an integer number (1022946540).

Almost surely, 2^20331031044 is an apocalyptic number.

It is an amenable number.

20331031044 is an abundant number, since it is smaller than the sum of its proper divisors (28770402876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20331031044 is a wasteful number, since it uses less digits than its factorization.

20331031044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31620 (or 31618 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20331031044 its reverse (44013013302), we get a palindrome (64344044346).

The spelling of 20331031044 in words is "twenty billion, three hundred thirty-one million, thirty-one thousand, forty-four".