19321235318 has 128 divisors (see below), whose sum is σ = 40536391680. Its totient is φ = 6668075520.

The previous prime is 19321235317. The next prime is 19321235333. The reversal of 19321235318 is 81353212391.

It is a happy number.

It is a super-2 number, since 2×19321235318² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19321235317) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8106755 + ... + 8109137.

It is an arithmetic number, because the mean of its divisors is an integer number (316690560).

Almost surely, 2^19321235318 is an apocalyptic number.

19321235318 is an abundant number, since it is smaller than the sum of its proper divisors (21215156362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19321235318 is a wasteful number, since it uses less digits than its factorization.

19321235318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2602.

The product of its digits is 38880, while the sum is 38.

The spelling of 19321235318 in words is "nineteen billion, three hundred twenty-one million, two hundred thirty-five thousand, three hundred eighteen".