31424434420 has 48 divisors (see below), whose sum is σ = 68199295248. Its totient is φ = 12154634240.

The previous prime is 31424434417. The next prime is 31424434453. The reversal of 31424434420 is 2443442413.

It can be written as a sum of positive squares in 8 ways, for example, as 7249160164 + 24175274256 = 85142^2 + 155484^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76909 + ... + 262228.

It is an arithmetic number, because the mean of its divisors is an integer number (1420818651).

Almost surely, 2^31424434420 is an apocalyptic number.

It is an amenable number.

31424434420 is an abundant number, since it is smaller than the sum of its proper divisors (36774860828).

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

31424434420 is a wasteful number, since it uses less digits than its factorization.

31424434420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339300 (or 339298 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 31424434420 its reverse (2443442413), we get a palindrome (33867876833).

The spelling of 31424434420 in words is "thirty-one billion, four hundred twenty-four million, four hundred thirty-four thousand, four hundred twenty".