21176079284 has 12 divisors (see below), whose sum is σ = 37059658944. Its totient is φ = 10587605304.

The previous prime is 21176079271. The next prime is 21176079289. The reversal of 21176079284 is 48297067112.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17339 + ... + 206525.

It is an arithmetic number, because the mean of its divisors is an integer number (3088304912).

Almost surely, 2^21176079284 is an apocalyptic number.

It is an amenable number.

21176079284 is a deficient number, since it is larger than the sum of its proper divisors (15883579660).

21176079284 is a wasteful number, since it uses less digits than its factorization.

21176079284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217174 (or 217172 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 47.

The spelling of 21176079284 in words is "twenty-one billion, one hundred seventy-six million, seventy-nine thousand, two hundred eighty-four".