31820821703 has 8 divisors (see below), whose sum is σ = 34818502656. Its totient is φ = 28840620600.

The previous prime is 31820821667. The next prime is 31820821709. The reversal of 31820821703 is 30712802813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31820821703 - 2⁶ = 31820821639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31820821709) 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 7 ways as a sum of consecutive naturals, for example, 4366151 + ... + 4373432.

It is an arithmetic number, because the mean of its divisors is an integer number (4352312832).

Almost surely, 2^31820821703 is an apocalyptic number.

31820821703 is a deficient number, since it is larger than the sum of its proper divisors (2997680953).

31820821703 is a wasteful number, since it uses less digits than its factorization.

31820821703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8739925.

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 31820821703 in words is "thirty-one billion, eight hundred twenty million, eight hundred twenty-one thousand, seven hundred three".