21020443243300 has 36 divisors (see below), whose sum is σ = 47085792871936. Its totient is φ = 8136945770400.

The previous prime is 21020443243291. The next prime is 21020443243313. The reversal of 21020443243300 is 334234402012.

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, 3390390972 + ... + 3390397171.

Almost surely, 2^{21020443243300} is an apocalyptic number.

21020443243300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020443243300 is an abundant number, since it is smaller than the sum of its proper divisors (26065349628636).

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

21020443243300 is a wasteful number, since it uses less digits than its factorization.

21020443243300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6780788188 (or 6780788181 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21020443243300 its reverse (334234402012), we get a palindrome (21354677645312).

It can be divided in two parts, 2102044 and 3243300, that added together give a square (5345344 = 2312²).

The spelling of 21020443243300 in words is "twenty-one trillion, twenty billion, four hundred forty-three million, two hundred forty-three thousand, three hundred".