20544211100 has 72 divisors (see below), whose sum is σ = 50984653440. Its totient is φ = 7038889920.

The previous prime is 20544211099. The next prime is 20544211123. The reversal of 20544211100 is 111244502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1096007 + ... + 1114593.

Almost surely, 2^20544211100 is an apocalyptic number.

20544211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20544211100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25492326720).

20544211100 is an abundant number, since it is smaller than the sum of its proper divisors (30440442340).

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

20544211100 is a wasteful number, since it uses less digits than its factorization.

20544211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20187 (or 20180 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 20544211100 its reverse (111244502), we get a palindrome (20655455602).

The spelling of 20544211100 in words is "twenty billion, five hundred forty-four million, two hundred eleven thousand, one hundred".