31144124020 has 12 divisors (see below), whose sum is σ = 65402660484. Its totient is φ = 12457649600.

The previous prime is 31144124017. The next prime is 31144124041. The reversal of 31144124020 is 2042144113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24074004964 + 7070119056 = 155158^2 + 84084^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31144123982 and 31144124000.

It is a congruent number.

It is an unprimeable number.

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, 778603081 + ... + 778603120.

It is an arithmetic number, because the mean of its divisors is an integer number (5450221707).

Almost surely, 2^31144124020 is an apocalyptic number.

It is an amenable number.

31144124020 is an abundant number, since it is smaller than the sum of its proper divisors (34258536464).

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

31144124020 is a wasteful number, since it uses less digits than its factorization.

31144124020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557206210 (or 1557206208 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 31144124020 its reverse (2042144113), we get a palindrome (33186268133).

The spelling of 31144124020 in words is "thirty-one billion, one hundred forty-four million, one hundred twenty-four thousand, twenty".