21108802192 has 40 divisors (see below), whose sum is σ = 41279570240. Its totient is φ = 10456387200.

The previous prime is 21108802163. The next prime is 21108802219. The reversal of 21108802192 is 29120880112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 904138 + ... + 927190.

It is an arithmetic number, because the mean of its divisors is an integer number (1031989256).

Almost surely, 2^21108802192 is an apocalyptic number.

It is an amenable number.

21108802192 is a deficient number, since it is larger than the sum of its proper divisors (20170768048).

21108802192 is a wasteful number, since it uses less digits than its factorization.

21108802192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23591 (or 23585 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 34.

The spelling of 21108802192 in words is "twenty-one billion, one hundred eight million, eight hundred two thousand, one hundred ninety-two".