21650100200 has 24 divisors (see below), whose sum is σ = 50336483430. Its totient is φ = 8660040000.

The previous prime is 21650100119. The next prime is 21650100293. The reversal of 21650100200 is 200105612.

It can be written as a sum of positive squares in 3 ways, for example, as 14806509124 + 6843591076 = 121682^2 + 82726^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54125051 + ... + 54125450.

Almost surely, 2^21650100200 is an apocalyptic number.

21650100200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21650100200 is an abundant number, since it is smaller than the sum of its proper divisors (28686383230).

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

21650100200 is a wasteful number, since it uses less digits than its factorization.

21650100200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108250517 (or 108250508 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 21650100200 its reverse (200105612), we get a palindrome (21850205812).

The spelling of 21650100200 in words is "twenty-one billion, six hundred fifty million, one hundred thousand, two hundred".