19312318081 has 8 divisors (see below), whose sum is σ = 22128850944. Its totient is φ = 16510192800.

The previous prime is 19312318049. The next prime is 19312318159. The reversal of 19312318081 is 18081321391.

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

It is a cyclic number.

It is not a de Polignac number, because 19312318081 - 2⁵ = 19312318049 is a prime.

It is a super-2 number, since 2×19312318081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19312318081.

It is not an unprimeable number, because it can be changed into a prime (19312018081) 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 in 7 ways as a sum of consecutive naturals, for example, 3599020 + ... + 3604381.

It is an arithmetic number, because the mean of its divisors is an integer number (2766106368).

Almost surely, 2^19312318081 is an apocalyptic number.

It is an amenable number.

19312318081 is a deficient number, since it is larger than the sum of its proper divisors (2816532863).

19312318081 is an equidigital number, since it uses as much as digits as its factorization.

19312318081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7203791.

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 19312318081 in words is "nineteen billion, three hundred twelve million, three hundred eighteen thousand, eighty-one".