21234975874328 has 8 divisors (see below), whose sum is σ = 39815579764380. Its totient is φ = 10617487937160.

The previous prime is 21234975874297. The next prime is 21234975874331. The reversal of 21234975874328 is 82347857943212.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1327185992138 + ... + 1327185992153.

Almost surely, 2^{21234975874328} is an apocalyptic number.

It is an amenable number.

21234975874328 is a deficient number, since it is larger than the sum of its proper divisors (18580603890052).

21234975874328 is a wasteful number, since it uses less digits than its factorization.

21234975874328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654371984297 (or 2654371984293 counting only the distinct ones).

The product of its digits is 162570240, while the sum is 65.

The spelling of 21234975874328 in words is "twenty-one trillion, two hundred thirty-four billion, nine hundred seventy-five million, eight hundred seventy-four thousand, three hundred twenty-eight".