20131123233 has 8 divisors (see below), whose sum is σ = 28906228288. Its totient is φ = 12388383504.

The previous prime is 20131123231. The next prime is 20131123249. The reversal of 20131123233 is 33232113102.

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

It is not a de Polignac number, because 20131123233 - 2¹ = 20131123231 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20131123231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258091285 + ... + 258091362.

It is an arithmetic number, because the mean of its divisors is an integer number (3613278536).

Almost surely, 2^20131123233 is an apocalyptic number.

It is an amenable number.

20131123233 is a deficient number, since it is larger than the sum of its proper divisors (8775105055).

20131123233 is a wasteful number, since it uses less digits than its factorization.

20131123233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516182663.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20131123233 its reverse (33232113102), we get a palindrome (53363236335).

The spelling of 20131123233 in words is "twenty billion, one hundred thirty-one million, one hundred twenty-three thousand, two hundred thirty-three".