21176079286 has 4 divisors (see below), whose sum is σ = 31764118932. Its totient is φ = 10588039642.

The previous prime is 21176079271. The next prime is 21176079289. The reversal of 21176079286 is 68297067112.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21176079289) by changing a digit.

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, 5294019820 + ... + 5294019823.

It is an arithmetic number, because the mean of its divisors is an integer number (7941029733).

Almost surely, 2^21176079286 is an apocalyptic number.

21176079286 is a deficient number, since it is larger than the sum of its proper divisors (10588039646).

21176079286 is a wasteful number, since it uses less digits than its factorization.

21176079286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10588039645.

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 21176079286 in words is "twenty-one billion, one hundred seventy-six million, seventy-nine thousand, two hundred eighty-six".