31342320420 has 24 divisors (see below), whose sum is σ = 87758497344. Its totient is φ = 8357952096.

The previous prime is 31342320413. The next prime is 31342320469. The reversal of 31342320420 is 2402324313.

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 7 ways as a sum of consecutive naturals, for example, 261185944 + ... + 261186063.

It is an arithmetic number, because the mean of its divisors is an integer number (3656604056).

Almost surely, 2^31342320420 is an apocalyptic number.

31342320420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31342320420 is an abundant number, since it is smaller than the sum of its proper divisors (56416176924).

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

31342320420 is a wasteful number, since it uses less digits than its factorization.

31342320420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522372019 (or 522372017 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 31342320420 its reverse (2402324313), we get a palindrome (33744644733).

The spelling of 31342320420 in words is "thirty-one billion, three hundred forty-two million, three hundred twenty thousand, four hundred twenty".