20120231323 has 4 divisors (see below), whose sum is σ = 21303774360. Its totient is φ = 18936688288.

The previous prime is 20120231321. The next prime is 20120231353. The reversal of 20120231323 is 32313202102.

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

It is a cyclic number.

It is not a de Polignac number, because 20120231323 - 2¹ = 20120231321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20120231323.

It is not an unprimeable number, because it can be changed into a prime (20120231321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591771493 + ... + 591771526.

It is an arithmetic number, because the mean of its divisors is an integer number (5325943590).

Almost surely, 2^20120231323 is an apocalyptic number.

20120231323 is a deficient number, since it is larger than the sum of its proper divisors (1183543037).

20120231323 is a wasteful number, since it uses less digits than its factorization.

20120231323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183543036.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20120231323 its reverse (32313202102), we get a palindrome (52433433425).

The spelling of 20120231323 in words is "twenty billion, one hundred twenty million, two hundred thirty-one thousand, three hundred twenty-three".