31820823123 has 8 divisors (see below), whose sum is σ = 42466234368. Its totient is φ = 21194646984.

The previous prime is 31820823119. The next prime is 31820823143. The reversal of 31820823123 is 32132802813.

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

It is not a de Polignac number, because 31820823123 - 2² = 31820823119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31820823103) 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, 4804915 + ... + 4811532.

It is an arithmetic number, because the mean of its divisors is an integer number (5308279296).

Almost surely, 2^31820823123 is an apocalyptic number.

31820823123 is a deficient number, since it is larger than the sum of its proper divisors (10645411245).

31820823123 is a wasteful number, since it uses less digits than its factorization.

31820823123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9617553.

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 31820823123 in words is "thirty-one billion, eight hundred twenty million, eight hundred twenty-three thousand, one hundred twenty-three".