20137303 has 4 divisors (see below), whose sum is σ = 20209248. Its totient is φ = 20065360.

The previous prime is 20137301. The next prime is 20137307. The reversal of 20137303 is 30373102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30373102 = 2 ⋅15186551.

It is a cyclic number.

It is not a de Polignac number, because 20137303 - 2¹ = 20137301 is a prime.

It is a super-2 number, since 2×20137303² = 811021944227618, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20137301) 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 3 ways as a sum of consecutive naturals, for example, 35551 + ... + 36112.

It is an arithmetic number, because the mean of its divisors is an integer number (5052312).

Almost surely, 2^20137303 is an apocalyptic number.

20137303 is a deficient number, since it is larger than the sum of its proper divisors (71945).

20137303 is an equidigital number, since it uses as much as digits as its factorization.

20137303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71944.

The product of its (nonzero) digits is 378, while the sum is 19.

The square root of 20137303 is about 4487.4606404959. The cubic root of 20137303 is about 272.0615084010.

It can be divided in two parts, 2013 and 7303, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 20137303 in words is "twenty million, one hundred thirty-seven thousand, three hundred three".