20423230100 has 144 divisors (see below), whose sum is σ = 55238131200. Its totient is φ = 6381573120.

The previous prime is 20423230057. The next prime is 20423230123. The reversal of 20423230100 is 103232402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 704696 + ... + 733104.

Almost surely, 2^20423230100 is an apocalyptic number.

20423230100 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 20423230100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27619065600).

20423230100 is an abundant number, since it is smaller than the sum of its proper divisors (34814901100).

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

20423230100 is a wasteful number, since it uses less digits than its factorization.

20423230100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28522 (or 28515 counting only the distinct ones).

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

Adding to 20423230100 its reverse (103232402), we get a palindrome (20526462502).

The spelling of 20423230100 in words is "twenty billion, four hundred twenty-three million, two hundred thirty thousand, one hundred".