31443013420 has 96 divisors (see below), whose sum is σ = 84801604608. Its totient is φ = 9518522112.

The previous prime is 31443013411. The next prime is 31443013517. The reversal of 31443013420 is 2431034413.

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 31 ways as a sum of consecutive naturals, for example, 333714 + ... + 417433.

It is an arithmetic number, because the mean of its divisors is an integer number (883350048).

Almost surely, 2^31443013420 is an apocalyptic number.

It is an amenable number.

31443013420 is an abundant number, since it is smaller than the sum of its proper divisors (53358591188).

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

31443013420 is a wasteful number, since it uses less digits than its factorization.

31443013420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751199 (or 751197 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31443013420 its reverse (2431034413), we get a palindrome (33874047833).

The spelling of 31443013420 in words is "thirty-one billion, four hundred forty-three million, thirteen thousand, four hundred twenty".