20001200323 has 4 divisors (see below), whose sum is σ = 21539754208. Its totient is φ = 18462646440.

The previous prime is 20001200309. The next prime is 20001200339. The reversal of 20001200323 is 32300210002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32300210002 = 2 ⋅16150105001.

It is a cyclic number.

It is not a de Polignac number, because 20001200323 - 2¹⁷ = 20001069251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 1538553871 = 20001200323 / (2 + 0 + 0 + 0 + 1 + 2 + 0 + 0 + 3 + 2 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001200363) 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, 769276923 + ... + 769276948.

It is an arithmetic number, because the mean of its divisors is an integer number (5384938552).

Almost surely, 2^20001200323 is an apocalyptic number.

20001200323 is a deficient number, since it is larger than the sum of its proper divisors (1538553885).

20001200323 is a wasteful number, since it uses less digits than its factorization.

20001200323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538553884.

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

Adding to 20001200323 its reverse (32300210002), we get a palindrome (52301410325).

The spelling of 20001200323 in words is "twenty billion, one million, two hundred thousand, three hundred twenty-three".