20201323 has 4 divisors (see below), whose sum is σ = 20217528. Its totient is φ = 20185120.

The previous prime is 20201303. The next prime is 20201329. The reversal of 20201323 is 32310202.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201329) 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, 6061 + ... + 8782.

It is an arithmetic number, because the mean of its divisors is an integer number (5054382).

Almost surely, 2^20201323 is an apocalyptic number.

20201323 is a deficient number, since it is larger than the sum of its proper divisors (16205).

20201323 is a wasteful number, since it uses less digits than its factorization.

20201323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16204.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20201323 is about 4494.5881902573. The cubic root of 20201323 is about 272.3495137456.

Adding to 20201323 its reverse (32310202), we get a palindrome (52511525).

The spelling of 20201323 in words is "twenty million, two hundred one thousand, three hundred twenty-three".