21169038692 has 24 divisors (see below), whose sum is σ = 37142727552. Its totient is φ = 10556859200.

The previous prime is 21169038661. The next prime is 21169038739. The reversal of 21169038692 is 29683096112.

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 in 7 ways as a sum of consecutive naturals, for example, 5452592 + ... + 5456472.

It is an arithmetic number, because the mean of its divisors is an integer number (1547613648).

Almost surely, 2^21169038692 is an apocalyptic number.

It is an amenable number.

21169038692 is a deficient number, since it is larger than the sum of its proper divisors (15973688860).

21169038692 is a wasteful number, since it uses less digits than its factorization.

21169038692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7099 (or 7097 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 21169038692 in words is "twenty-one billion, one hundred sixty-nine million, thirty-eight thousand, six hundred ninety-two".