20144100 has 72 divisors (see below), whose sum is σ = 59058720. Its totient is φ = 5300480.

The previous prime is 20144093. The next prime is 20144101. The reversal of 20144100 is 144102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (20144101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24496 + ... + 25304.

It is an arithmetic number, because the mean of its divisors is an integer number (820260).

Almost surely, 2^20144100 is an apocalyptic number.

20144100 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 20144100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29529360).

20144100 is an abundant number, since it is smaller than the sum of its proper divisors (38914620).

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

20144100 is a wasteful number, since it uses less digits than its factorization.

20144100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909 (or 902 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 20144100 is about 4488.2179091484. The cubic root of 20144100 is about 272.0921148507.

Adding to 20144100 its reverse (144102), we get a palindrome (20288202).

The spelling of 20144100 in words is "twenty million, one hundred forty-four thousand, one hundred".