193318931688 has 32 divisors (see below), whose sum is σ = 511726584960. Its totient is φ = 60649076480.

The previous prime is 193318931681. The next prime is 193318931693. The reversal of 193318931688 is 886139813391.

It is a super-2 number, since 2×193318931688² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (193318931681) 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, 236910048 + ... + 236910863.

It is an arithmetic number, because the mean of its divisors is an integer number (15991455780).

Almost surely, 2^193318931688 is an apocalyptic number.

It is an amenable number.

193318931688 is an abundant number, since it is smaller than the sum of its proper divisors (318407653272).

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

193318931688 is a wasteful number, since it uses less digits than its factorization.

193318931688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473820937 (or 473820933 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 60.

The spelling of 193318931688 in words is "one hundred ninety-three billion, three hundred eighteen million, nine hundred thirty-one thousand, six hundred eighty-eight".