20300143 has 2 divisors, whose sum is σ = 20300144. Its totient is φ = 20300142.

The previous prime is 20300123. The next prime is 20300177. The reversal of 20300143 is 34100302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20300143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20300123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10150071 + 10150072.

It is an arithmetic number, because the mean of its divisors is an integer number (10150072).

Almost surely, 2^20300143 is an apocalyptic number.

20300143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20300143 is an equidigital number, since it uses as much as digits as its factorization.

20300143 is an evil number, because the sum of its binary digits is even.

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

The square root of 20300143 is about 4505.5679997088. The cubic root of 20300143 is about 272.7928809599.

Adding to 20300143 its reverse (34100302), we get a palindrome (54400445).

The spelling of 20300143 in words is "twenty million, three hundred thousand, one hundred forty-three".