20380323 has 16 divisors (see below), whose sum is σ = 29018880. Its totient is φ = 12692064.

The previous prime is 20380309. The next prime is 20380333. The reversal of 20380323 is 32308302.

It is not a de Polignac number, because 20380323 - 2⁴ = 20380307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20380323.

It is not an unprimeable number, because it can be changed into a prime (20380333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468 + ... + 6401.

It is an arithmetic number, because the mean of its divisors is an integer number (1813680).

Almost surely, 2^20380323 is an apocalyptic number.

20380323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20380323 is a deficient number, since it is larger than the sum of its proper divisors (8638557).

20380323 is a wasteful number, since it uses less digits than its factorization.

20380323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6938.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20380323 is about 4514.4571102182. The cubic root of 20380323 is about 273.1515615101.

Adding to 20380323 its reverse (32308302), we get a palindrome (52688625).

The spelling of 20380323 in words is "twenty million, three hundred eighty thousand, three hundred twenty-three".