31423433320 has 16 divisors (see below), whose sum is σ = 70702725060. Its totient is φ = 12569373312.

The previous prime is 31423433303. The next prime is 31423433351. The reversal of 31423433320 is 2333432413.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25665962436 + 5757470884 = 160206^2 + 75878^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392792877 + ... + 392792956.

Almost surely, 2^31423433320 is an apocalyptic number.

It is an amenable number.

31423433320 is an abundant number, since it is smaller than the sum of its proper divisors (39279291740).

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

31423433320 is a wasteful number, since it uses less digits than its factorization.

31423433320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785585844 (or 785585840 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 28.

Adding to 31423433320 its reverse (2333432413), we get a palindrome (33756865733).

The spelling of 31423433320 in words is "thirty-one billion, four hundred twenty-three million, four hundred thirty-three thousand, three hundred twenty".