31044020020 has 48 divisors (see below), whose sum is σ = 71919641808. Its totient is φ = 11182832640.

The previous prime is 31044020017. The next prime is 31044020089. The reversal of 31044020020 is 2002044013.

It can be written as a sum of positive squares in 8 ways, for example, as 3235789456 + 27808230564 = 56884^2 + 166758^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31044019976 and 31044020003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1445439 + ... + 1466758.

It is an arithmetic number, because the mean of its divisors is an integer number (1498325871).

Almost surely, 2^31044020020 is an apocalyptic number.

It is an amenable number.

31044020020 is an abundant number, since it is smaller than the sum of its proper divisors (40875621788).

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

31044020020 is a wasteful number, since it uses less digits than its factorization.

31044020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2912260 (or 2912258 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 31044020020 its reverse (2002044013), we get a palindrome (33046064033).

The spelling of 31044020020 in words is "thirty-one billion, forty-four million, twenty thousand, twenty".