21345244300 has 36 divisors (see below), whose sum is σ = 48333062736. Its totient is φ = 8166875200.

The previous prime is 21345244279. The next prime is 21345244331. The reversal of 21345244300 is 344254312.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4637971 + ... + 4642570.

It is an arithmetic number, because the mean of its divisors is an integer number (1342585076).

Almost surely, 2^21345244300 is an apocalyptic number.

21345244300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21345244300 is an abundant number, since it is smaller than the sum of its proper divisors (26987818436).

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

21345244300 is a wasteful number, since it uses less digits than its factorization.

21345244300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9280578 (or 9280571 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 21345244300 its reverse (344254312), we get a palindrome (21689498612).

It can be divided in two parts, 213452 and 44300, that added together give a palindrome (257752).

The spelling of 21345244300 in words is "twenty-one billion, three hundred forty-five million, two hundred forty-four thousand, three hundred".