31836881623 has 2 divisors, whose sum is σ = 31836881624. Its totient is φ = 31836881622.

The previous prime is 31836881599. The next prime is 31836881627. The reversal of 31836881623 is 32618863813.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31836881623 is a prime.

It is a super-2 number, since 2×31836881623² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31836881627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15918440811 + 15918440812.

It is an arithmetic number, because the mean of its divisors is an integer number (15918440812).

Almost surely, 2^31836881623 is an apocalyptic number.

31836881623 is a deficient number, since it is larger than the sum of its proper divisors (1).

31836881623 is an equidigital number, since it uses as much as digits as its factorization.

31836881623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 49.

The spelling of 31836881623 in words is "thirty-one billion, eight hundred thirty-six million, eight hundred eighty-one thousand, six hundred twenty-three".