20133331231 has 8 divisors (see below), whose sum is σ = 21683227104. Its totient is φ = 18583603680.

The previous prime is 20133331223. The next prime is 20133331237. The reversal of 20133331231 is 13213333102.

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

It is a cyclic number.

It is not a de Polignac number, because 20133331231 - 2³ = 20133331223 is a prime.

It is a super-2 number, since 2×20133331231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133331237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325005 + ... + 381961.

It is an arithmetic number, because the mean of its divisors is an integer number (2710403388).

Almost surely, 2^20133331231 is an apocalyptic number.

20133331231 is a deficient number, since it is larger than the sum of its proper divisors (1549895873).

20133331231 is a wasteful number, since it uses less digits than its factorization.

20133331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84161.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 20133331231 its reverse (13213333102), we get a palindrome (33346664333).

The spelling of 20133331231 in words is "twenty billion, one hundred thirty-three million, three hundred thirty-one thousand, two hundred thirty-one".