20131355233 has 8 divisors (see below), whose sum is σ = 22000913280. Its totient is φ = 18268369680.

The previous prime is 20131355213. The next prime is 20131355333. The reversal of 20131355233 is 33255313102.

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

It is not a de Polignac number, because 20131355233 - 2⁹ = 20131354721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20131355203) 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, 1636713 + ... + 1648966.

It is an arithmetic number, because the mean of its divisors is an integer number (2750114160).

Almost surely, 2^20131355233 is an apocalyptic number.

It is an amenable number.

20131355233 is a deficient number, since it is larger than the sum of its proper divisors (1869558047).

20131355233 is a wasteful number, since it uses less digits than its factorization.

20131355233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286247.

The product of its (nonzero) digits is 8100, while the sum is 28.

Adding to 20131355233 its reverse (33255313102), we get a palindrome (53386668335).

The spelling of 20131355233 in words is "twenty billion, one hundred thirty-one million, three hundred fifty-five thousand, two hundred thirty-three".