20137323 has 4 divisors (see below), whose sum is σ = 26849768. Its totient is φ = 13424880.

The previous prime is 20137309. The next prime is 20137331. The reversal of 20137323 is 32373102.

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

It is not a de Polignac number, because 20137323 - 2⁴ = 20137307 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 20137323.

It is not an unprimeable number, because it can be changed into a prime (20137393) 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, 3356218 + ... + 3356223.

It is an arithmetic number, because the mean of its divisors is an integer number (6712442).

Almost surely, 2^20137323 is an apocalyptic number.

20137323 is a deficient number, since it is larger than the sum of its proper divisors (6712445).

20137323 is an equidigital number, since it uses as much as digits as its factorization.

20137323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6712444.

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 20137323 is about 4487.4628689272. The cubic root of 20137323 is about 272.0615984698.

The spelling of 20137323 in words is "twenty million, one hundred thirty-seven thousand, three hundred twenty-three".