31424320203424 has 24 divisors (see below), whose sum is σ = 61866976046400. Its totient is φ = 15712072318656.

The previous prime is 31424320203421. The next prime is 31424320203449. The reversal of 31424320203424 is 42430202342413.

It is a self number, because there is not a number n which added to its sum of digits gives 31424320203424.

It is not an unprimeable number, because it can be changed into a prime (31424320203421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3277177 + ... + 8578375.

It is an arithmetic number, because the mean of its divisors is an integer number (2577790668600).

Almost surely, 2^{31424320203424} is an apocalyptic number.

It is an amenable number.

31424320203424 is a deficient number, since it is larger than the sum of its proper divisors (30442655842976).

31424320203424 is a wasteful number, since it uses less digits than its factorization.

31424320203424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5486452 (or 5486444 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 34.

Adding to 31424320203424 its reverse (42430202342413), we get a palindrome (73854522545837).

The spelling of 31424320203424 in words is "thirty-one trillion, four hundred twenty-four billion, three hundred twenty million, two hundred three thousand, four hundred twenty-four".