20133302231 has 24 divisors (see below), whose sum is σ = 24130658160. Its totient is φ = 16741076352.

The previous prime is 20133302213. The next prime is 20133302237. The reversal of 20133302231 is 13220333102.

It is a de Polignac number, because none of the positive numbers 2^k-20133302231 is a prime.

It is a super-2 number, since 2×20133302231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133302237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187580 + ... + 274686.

It is an arithmetic number, because the mean of its divisors is an integer number (1005444090).

Almost surely, 2^20133302231 is an apocalyptic number.

20133302231 is a deficient number, since it is larger than the sum of its proper divisors (3997355929).

20133302231 is an equidigital number, since it uses as much as digits as its factorization.

20133302231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87263 (or 87256 counting only the distinct ones).

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

Adding to 20133302231 its reverse (13220333102), we get a palindrome (33353635333).

The spelling of 20133302231 in words is "twenty billion, one hundred thirty-three million, three hundred two thousand, two hundred thirty-one".