20030143 has 12 divisors (see below), whose sum is σ = 23303280. Its totient is φ = 16865280.

The previous prime is 20030137. The next prime is 20030159. The reversal of 20030143 is 34103002.

It is not a de Polignac number, because 20030143 - 2⁹ = 20029631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20030173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25663 + ... + 26431.

It is an arithmetic number, because the mean of its divisors is an integer number (1941940).

Almost surely, 2^20030143 is an apocalyptic number.

20030143 is a deficient number, since it is larger than the sum of its proper divisors (3273137).

20030143 is an frugal number, since it uses more digits than its factorization.

20030143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898 (or 837 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20030143 is about 4475.5047760001. The cubic root of 20030143 is about 271.5780610249.

Adding to 20030143 its reverse (34103002), we get a palindrome (54133145).

The spelling of 20030143 in words is "twenty million, thirty thousand, one hundred forty-three".