31043142020 has 48 divisors (see below), whose sum is σ = 74860027200. Its totient is φ = 10694286720.

The previous prime is 31043142007. The next prime is 31043142029. The reversal of 31043142020 is 2024134013.

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 = 31043141983 and 31043142001.

It is not an unprimeable number, because it can be changed into a prime (31043142029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3709115 + ... + 3717474.

It is an arithmetic number, because the mean of its divisors is an integer number (1559583900).

Almost surely, 2^31043142020 is an apocalyptic number.

It is an amenable number.

31043142020 is an abundant number, since it is smaller than the sum of its proper divisors (43816885180).

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

31043142020 is a wasteful number, since it uses less digits than its factorization.

31043142020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7426628 (or 7426626 counting only the distinct ones).

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

Adding to 31043142020 its reverse (2024134013), we get a palindrome (33067276033).

The spelling of 31043142020 in words is "thirty-one billion, forty-three million, one hundred forty-two thousand, twenty".