20181303 has 12 divisors (see below), whose sum is σ = 30156360. Its totient is φ = 12990096.

The previous prime is 20181247. The next prime is 20181311. The reversal of 20181303 is 30318102.

It is not a de Polignac number, because 20181303 - 2⁸ = 20181047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20181313) 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, 38401 + ... + 38922.

It is an arithmetic number, because the mean of its divisors is an integer number (2513030).

Almost surely, 2^20181303 is an apocalyptic number.

20181303 is a deficient number, since it is larger than the sum of its proper divisors (9975057).

20181303 is a wasteful number, since it uses less digits than its factorization.

20181303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77358 (or 77355 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 20181303 is about 4492.3605153638. The cubic root of 20181303 is about 272.2595156891.

Adding to 20181303 its reverse (30318102), we get a palindrome (50499405).

It can be divided in two parts, 2018 and 1303, that added together give a triangular number (3321 = T₈₁).

The spelling of 20181303 in words is "twenty million, one hundred eighty-one thousand, three hundred three".