193888931930 has 32 divisors (see below), whose sum is σ = 369881432640. Its totient is φ = 72923961600.

The previous prime is 193888931923. The next prime is 193888932037. The reversal of 193888931930 is 39139888391.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 363920 + ... + 721259.

It is an arithmetic number, because the mean of its divisors is an integer number (11558794770).

Almost surely, 2^193888931930 is an apocalyptic number.

193888931930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

193888931930 is a deficient number, since it is larger than the sum of its proper divisors (175992500710).

193888931930 is a wasteful number, since it uses less digits than its factorization.

193888931930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086254.

The product of its (nonzero) digits is 10077696, while the sum is 62.

The spelling of 193888931930 in words is "one hundred ninety-three billion, eight hundred eighty-eight million, nine hundred thirty-one thousand, nine hundred thirty".