20243131100 has 18 divisors (see below), whose sum is σ = 43927594704. Its totient is φ = 8097252400.

The previous prime is 20243131067. The next prime is 20243131147. The reversal of 20243131100 is 113134202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101215556 + ... + 101215755.

It is an arithmetic number, because the mean of its divisors is an integer number (2440421928).

Almost surely, 2^20243131100 is an apocalyptic number.

20243131100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20243131100 is an abundant number, since it is smaller than the sum of its proper divisors (23684463604).

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

20243131100 is a wasteful number, since it uses less digits than its factorization.

20243131100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202431325 (or 202431318 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20243131100 its reverse (113134202), we get a palindrome (20356265302).

The spelling of 20243131100 in words is "twenty billion, two hundred forty-three million, one hundred thirty-one thousand, one hundred".