20443021100 has 36 divisors (see below), whose sum is σ = 44627029104. Its totient is φ = 8128236480.

The previous prime is 20443021091. The next prime is 20443021103. The reversal of 20443021100 is 112034402.

It is a super-2 number, since 2×20443021100² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20443021103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 595367 + ... + 628766.

Almost surely, 2^20443021100 is an apocalyptic number.

20443021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20443021100 is an abundant number, since it is smaller than the sum of its proper divisors (24184008004).

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

20443021100 is a wasteful number, since it uses less digits than its factorization.

20443021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224314 (or 1224307 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20443021100 its reverse (112034402), we get a palindrome (20555055502).

It can be divided in two parts, 2044302 and 1100, that added together give a palindrome (2045402).

The spelling of 20443021100 in words is "twenty billion, four hundred forty-three million, twenty-one thousand, one hundred".