31043241020 has 96 divisors (see below), whose sum is σ = 72949415616. Its totient is φ = 10998374400.

The previous prime is 31043241007. The next prime is 31043241049. The reversal of 31043241020 is 2014234013.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31043240983 and 31043241001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8449904 + ... + 8453576.

It is an arithmetic number, because the mean of its divisors is an integer number (759889746).

Almost surely, 2^31043241020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31043241020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36474707808).

31043241020 is an abundant number, since it is smaller than the sum of its proper divisors (41906174596).

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

31043241020 is a wasteful number, since it uses less digits than its factorization.

31043241020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4671 (or 4669 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31043241020 its reverse (2014234013), we get a palindrome (33057475033).

The spelling of 31043241020 in words is "thirty-one billion, forty-three million, two hundred forty-one thousand, twenty".