31820666834 has 16 divisors (see below), whose sum is σ = 52076916576. Its totient is φ = 14462068800.

The previous prime is 31820666791. The next prime is 31820666837. The reversal of 31820666834 is 43866602813.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31820666837) 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, 88289 + ... + 267275.

It is an arithmetic number, because the mean of its divisors is an integer number (3254807286).

Almost surely, 2^31820666834 is an apocalyptic number.

31820666834 is a deficient number, since it is larger than the sum of its proper divisors (20256249742).

31820666834 is a wasteful number, since it uses less digits than its factorization.

31820666834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187081.

The product of its (nonzero) digits is 995328, while the sum is 47.

The spelling of 31820666834 in words is "thirty-one billion, eight hundred twenty million, six hundred sixty-six thousand, eight hundred thirty-four".