21300043220 has 12 divisors (see below), whose sum is σ = 44730090804. Its totient is φ = 8520017280.

The previous prime is 21300043211. The next prime is 21300043283. The reversal of 21300043220 is 2234000312.

It can be written as a sum of positive squares in 2 ways, for example, as 4205003716 + 17095039504 = 64846^2 + 130748^2 .

It is a congruent number.

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, 532501061 + ... + 532501100.

It is an arithmetic number, because the mean of its divisors is an integer number (3727507567).

Almost surely, 2^21300043220 is an apocalyptic number.

21300043220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21300043220 is an abundant number, since it is smaller than the sum of its proper divisors (23430047584).

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

21300043220 is a wasteful number, since it uses less digits than its factorization.

21300043220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065002170 (or 1065002168 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21300043220 its reverse (2234000312), we get a palindrome (23534043532).

The spelling of 21300043220 in words is "twenty-one billion, three hundred million, forty-three thousand, two hundred twenty".