20011323 has 8 divisors (see below), whose sum is σ = 26741248. Its totient is φ = 13311144.

The previous prime is 20011319. The next prime is 20011349. The reversal of 20011323 is 32311002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20011323 - 2² = 20011319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011299 and 20011308.

It is not an unprimeable number, because it can be changed into a prime (20011373) 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 7 ways as a sum of consecutive naturals, for example, 5815 + ... + 8592.

It is an arithmetic number, because the mean of its divisors is an integer number (3342656).

Almost surely, 2^20011323 is an apocalyptic number.

20011323 is a deficient number, since it is larger than the sum of its proper divisors (6729925).

20011323 is a wasteful number, since it uses less digits than its factorization.

20011323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14873.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 20011323 is about 4473.4017257564. The cubic root of 20011323 is about 271.4929775799.

Adding to 20011323 its reverse (32311002), we get a palindrome (52322325).

The spelling of 20011323 in words is "twenty million, eleven thousand, three hundred twenty-three".