20145303 has 12 divisors (see below), whose sum is σ = 29165760. Its totient is φ = 13399296.

The previous prime is 20145277. The next prime is 20145313. The reversal of 20145303 is 30354102.

It is not a de Polignac number, because 20145303 - 2¹⁰ = 20144279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20145313) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1975 + ... + 6647.

It is an arithmetic number, because the mean of its divisors is an integer number (2430480).

Almost surely, 2^20145303 is an apocalyptic number.

20145303 is a deficient number, since it is larger than the sum of its proper divisors (9020457).

20145303 is a wasteful number, since it uses less digits than its factorization.

20145303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5158 (or 5155 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20145303 is about 4488.3519247047. The cubic root of 20145303 is about 272.0975311645.

Adding to 20145303 its reverse (30354102), we get a palindrome (50499405).

The spelling of 20145303 in words is "twenty million, one hundred forty-five thousand, three hundred three".