31443020120 has 32 divisors (see below), whose sum is σ = 71433666720. Its totient is φ = 12455097600.

The previous prime is 31443020111. The next prime is 31443020137. The reversal of 31443020120 is 2102034413.

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 = 31443020092 and 31443020101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3811781 + ... + 3820020.

It is an arithmetic number, because the mean of its divisors is an integer number (2232302085).

Almost surely, 2^31443020120 is an apocalyptic number.

It is an amenable number.

31443020120 is an abundant number, since it is smaller than the sum of its proper divisors (39990646600).

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

31443020120 is a wasteful number, since it uses less digits than its factorization.

31443020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7631915 (or 7631911 counting only the distinct ones).

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

Adding to 31443020120 its reverse (2102034413), we get a palindrome (33545054533).

The spelling of 31443020120 in words is "thirty-one billion, four hundred forty-three million, twenty thousand, one hundred twenty".