21440440300 has 18 divisors (see below), whose sum is σ = 46525755668. Its totient is φ = 8576176080.

The previous prime is 21440440267. The next prime is 21440440319. The reversal of 21440440300 is 304404412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107202102 + ... + 107202301.

Almost surely, 2^21440440300 is an apocalyptic number.

21440440300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21440440300 is an abundant number, since it is smaller than the sum of its proper divisors (25085315368).

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

21440440300 is a wasteful number, since it uses less digits than its factorization.

21440440300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214404417 (or 214404410 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21440440300 its reverse (304404412), we get a palindrome (21744844712).

The spelling of 21440440300 in words is "twenty-one billion, four hundred forty million, four hundred forty thousand, three hundred".