20381303 has 4 divisors (see below), whose sum is σ = 20499288. Its totient is φ = 20263320.

The previous prime is 20381299. The next prime is 20381311. The reversal of 20381303 is 30318302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20381303 - 2² = 20381299 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20381363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58733 + ... + 59078.

It is an arithmetic number, because the mean of its divisors is an integer number (5124822).

Almost surely, 2^20381303 is an apocalyptic number.

20381303 is a deficient number, since it is larger than the sum of its proper divisors (117985).

20381303 is a wasteful number, since it uses less digits than its factorization.

20381303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117984.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 20381303 is about 4514.5656490963. The cubic root of 20381303 is about 273.1559396586.

Adding to 20381303 its reverse (30318302), we get a palindrome (50699605).

The spelling of 20381303 in words is "twenty million, three hundred eighty-one thousand, three hundred three".