20203144 has 32 divisors (see below), whose sum is σ = 41328000. Its totient is φ = 9202752.

The previous prime is 20203133. The next prime is 20203151. The reversal of 20203144 is 44130202.

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6987 + ... + 9445.

It is an arithmetic number, because the mean of its divisors is an integer number (1291500).

Almost surely, 2^20203144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20203144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20664000).

20203144 is an abundant number, since it is smaller than the sum of its proper divisors (21124856).

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

20203144 is a wasteful number, since it uses less digits than its factorization.

20203144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557 (or 2553 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20203144 is about 4494.7907626496. The cubic root of 20203144 is about 272.3576969318.

Adding to 20203144 its reverse (44130202), we get a palindrome (64333346).

The spelling of 20203144 in words is "twenty million, two hundred three thousand, one hundred forty-four".