21803992112 has 80 divisors (see below), whose sum is σ = 49520401920. Its totient is φ = 9105578496.

The previous prime is 21803992097. The next prime is 21803992129. The reversal of 21803992112 is 21129930812.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2109068 + ... + 2119380.

It is an arithmetic number, because the mean of its divisors is an integer number (619005024).

Almost surely, 2^21803992112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21803992112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24760200960).

21803992112 is an abundant number, since it is smaller than the sum of its proper divisors (27716409808).

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

21803992112 is a wasteful number, since it uses less digits than its factorization.

21803992112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10810 (or 10804 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The spelling of 21803992112 in words is "twenty-one billion, eight hundred three million, nine hundred ninety-two thousand, one hundred twelve".