21289384676910 has 64 divisors (see below), whose sum is σ = 58395128601600. Its totient is φ = 4866029421312.

The previous prime is 21289384676873. The next prime is 21289384676929. The reversal of 21289384676910 is 1967648398212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7812946 + ... + 10179434.

It is an arithmetic number, because the mean of its divisors is an integer number (912423884400).

Almost surely, 2^{21289384676910} is an apocalyptic number.

21289384676910 is an abundant number, since it is smaller than the sum of its proper divisors (37105743924690).

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

21289384676910 is a wasteful number, since it uses less digits than its factorization.

21289384676910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409345.

The product of its (nonzero) digits is 62705664, while the sum is 66.

The spelling of 21289384676910 in words is "twenty-one trillion, two hundred eighty-nine billion, three hundred eighty-four million, six hundred seventy-six thousand, nine hundred ten".