20131233023 has 16 divisors (see below), whose sum is σ = 23535553536. Its totient is φ = 17032292640.

The previous prime is 20131233019. The next prime is 20131233047. The reversal of 20131233023 is 32033213102.

It is not a de Polignac number, because 20131233023 - 2² = 20131233019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20131232986 and 20131233004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131233013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1065911 + ... + 1084632.

It is an arithmetic number, because the mean of its divisors is an integer number (1470972096).

Almost surely, 2^20131233023 is an apocalyptic number.

20131233023 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20131233023 is a deficient number, since it is larger than the sum of its proper divisors (3404320513).

20131233023 is a wasteful number, since it uses less digits than its factorization.

20131233023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150614.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20131233023 its reverse (32033213102), we get a palindrome (52164446125).

The spelling of 20131233023 in words is "twenty billion, one hundred thirty-one million, two hundred thirty-three thousand, twenty-three".