21200200192 has 40 divisors (see below), whose sum is σ = 42442735500. Its totient is φ = 10579144704.

The previous prime is 21200200169. The next prime is 21200200201. The reversal of 21200200192 is 29100200212.

It can be written as a sum of positive squares in 2 ways, for example, as 20510822656 + 689377536 = 143216^2 + 26256^2 .

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, 219934 + ... + 301282.

Almost surely, 2^21200200192 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 21200200192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21221367750).

21200200192 is an abundant number, since it is smaller than the sum of its proper divisors (21242535308).

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

21200200192 is an frugal number, since it uses more digits than its factorization.

21200200192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81876 (or 81860 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 21200200192 in words is "twenty-one billion, two hundred million, two hundred thousand, one hundred ninety-two".