31420834643 has 4 divisors (see below), whose sum is σ = 34277274168. Its totient is φ = 28564395120.

The previous prime is 31420834637. The next prime is 31420834667. The reversal of 31420834643 is 34643802413.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31420834643 - 2¹² = 31420830547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31420834597 and 31420834606.

It is not an unprimeable number, because it can be changed into a prime (31420834843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428219746 + ... + 1428219767.

It is an arithmetic number, because the mean of its divisors is an integer number (8569318542).

Almost surely, 2^31420834643 is an apocalyptic number.

31420834643 is a deficient number, since it is larger than the sum of its proper divisors (2856439525).

31420834643 is a wasteful number, since it uses less digits than its factorization.

31420834643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856439524.

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 31420834643 in words is "thirty-one billion, four hundred twenty million, eight hundred thirty-four thousand, six hundred forty-three".