23203112013 has 20 divisors (see below), whose sum is σ = 34679459100. Its totient is φ = 15460699392.

The previous prime is 23203111991. The next prime is 23203112021. The reversal of 23203112013 is 31021130232.

23203112013 is a `hidden beast` number, since 2 + 320 + 311 + 20 + 13 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17807034249 + 5396077764 = 133443^2 + 73458^2 .

It is not a de Polignac number, because 23203112013 - 2⁹ = 23203111501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23203110013) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 84381 + ... + 231357.

It is an arithmetic number, because the mean of its divisors is an integer number (1733972955).

Almost surely, 2^23203112013 is an apocalyptic number.

It is an amenable number.

23203112013 is a deficient number, since it is larger than the sum of its proper divisors (11476347087).

23203112013 is a wasteful number, since it uses less digits than its factorization.

23203112013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148938 (or 148929 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 23203112013 its reverse (31021130232), we get a palindrome (54224242245).

The spelling of 23203112013 in words is "twenty-three billion, two hundred three million, one hundred twelve thousand, thirteen".