31014432020 has 144 divisors (see below), whose sum is σ = 77298084864. Its totient is φ = 10383225600.

The previous prime is 31014431947. The next prime is 31014432037. The reversal of 31014432020 is 2023441013.

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 = 31014431983 and 31014432001.

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 47 ways as a sum of consecutive naturals, for example, 14690765 + ... + 14692875.

It is an arithmetic number, because the mean of its divisors is an integer number (536792256).

Almost surely, 2^31014432020 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 31014432020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38649042432).

31014432020 is an abundant number, since it is smaller than the sum of its proper divisors (46283652844).

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

31014432020 is a wasteful number, since it uses less digits than its factorization.

31014432020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622 (or 2609 counting only the distinct ones).

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

Adding to 31014432020 its reverse (2023441013), we get a palindrome (33037873033).

The spelling of 31014432020 in words is "thirty-one billion, fourteen million, four hundred thirty-two thousand, twenty".