31042430120 has 64 divisors (see below), whose sum is σ = 75304494720. Its totient is φ = 11448670464.

The previous prime is 31042430113. The next prime is 31042430129. The reversal of 31042430120 is 2103424013.

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 = 31042430092 and 31042430101.

It is not an unprimeable number, because it can be changed into a prime (31042430129) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 425357 + ... + 492963.

It is an arithmetic number, because the mean of its divisors is an integer number (1176632730).

Almost surely, 2^31042430120 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 31042430120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37652247360).

31042430120 is an abundant number, since it is smaller than the sum of its proper divisors (44262064600).

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

31042430120 is a wasteful number, since it uses less digits than its factorization.

31042430120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68514 (or 68510 counting only the distinct ones).

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

Adding to 31042430120 its reverse (2103424013), we get a palindrome (33145854133).

The spelling of 31042430120 in words is "thirty-one billion, forty-two million, four hundred thirty thousand, one hundred twenty".