31818042673 has 8 divisors (see below), whose sum is σ = 33692694120. Its totient is φ = 29943724800.

The previous prime is 31818042643. The next prime is 31818042733. The reversal of 31818042673 is 37624081813.

It can be written as a sum of positive squares in 4 ways, for example, as 26215819569 + 5602223104 = 161913^2 + 74848^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31818042673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31818042643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128383 + ... + 283051.

It is an arithmetic number, because the mean of its divisors is an integer number (4211586765).

Almost surely, 2^31818042673 is an apocalyptic number.

It is an amenable number.

31818042673 is a deficient number, since it is larger than the sum of its proper divisors (1874651447).

31818042673 is a wasteful number, since it uses less digits than its factorization.

31818042673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166787.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 31818042673 in words is "thirty-one billion, eight hundred eighteen million, forty-two thousand, six hundred seventy-three".