193121909382 has 16 divisors (see below), whose sum is σ = 389993760000. Its totient is φ = 63748979592.

The previous prime is 193121909369. The next prime is 193121909429. The reversal of 193121909382 is 283909121391.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156246882 + ... + 156248117.

It is an arithmetic number, because the mean of its divisors is an integer number (24374610000).

Almost surely, 2^193121909382 is an apocalyptic number.

193121909382 is an abundant number, since it is smaller than the sum of its proper divisors (196871850618).

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

193121909382 is a wasteful number, since it uses less digits than its factorization.

193121909382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312495107.

The product of its (nonzero) digits is 209952, while the sum is 48.

The spelling of 193121909382 in words is "one hundred ninety-three billion, one hundred twenty-one million, nine hundred nine thousand, three hundred eighty-two".