21169371736108 has 12 divisors (see below), whose sum is σ = 37047342918600. Its totient is φ = 10584416616512.

The previous prime is 21169371736091. The next prime is 21169371736111. The reversal of 21169371736108 is 80163717396112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67135933 + ... + 67450516.

It is an arithmetic number, because the mean of its divisors is an integer number (3087278576550).

Almost surely, 2^{21169371736108} is an apocalyptic number.

It is an amenable number.

21169371736108 is a deficient number, since it is larger than the sum of its proper divisors (15877971182492).

21169371736108 is a wasteful number, since it uses less digits than its factorization.

21169371736108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134625776 (or 134625774 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 55.

The spelling of 21169371736108 in words is "twenty-one trillion, one hundred sixty-nine billion, three hundred seventy-one million, seven hundred thirty-six thousand, one hundred eight".