21894612200 has 24 divisors (see below), whose sum is σ = 50904973830. Its totient is φ = 8757844800.

The previous prime is 21894612127. The next prime is 21894612263. The reversal of 21894612200 is 221649812.

It can be written as a sum of positive squares in 3 ways, for example, as 13784168836 + 8110443364 = 117406^2 + 90058^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54736331 + ... + 54736730.

Almost surely, 2^21894612200 is an apocalyptic number.

21894612200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21894612200 is an abundant number, since it is smaller than the sum of its proper divisors (29010361630).

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

21894612200 is a wasteful number, since it uses less digits than its factorization.

21894612200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109473077 (or 109473068 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 21894612200 in words is "twenty-one billion, eight hundred ninety-four million, six hundred twelve thousand, two hundred".