20001132231 has 8 divisors (see below), whose sum is σ = 27005748480. Its totient is φ = 13165302072.

The previous prime is 20001132167. The next prime is 20001132271. The reversal of 20001132231 is 13223110002.

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

It is not a de Polignac number, because 20001132231 - 2⁶ = 20001132167 is a prime.

It is a super-2 number, since 2×20001132231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20001132231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001132271) 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, 42196245 + ... + 42196718.

It is an arithmetic number, because the mean of its divisors is an integer number (3375718560).

Almost surely, 2^20001132231 is an apocalyptic number.

20001132231 is a deficient number, since it is larger than the sum of its proper divisors (7004616249).

20001132231 is an equidigital number, since it uses as much as digits as its factorization.

20001132231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84393045.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20001132231 its reverse (13223110002), we get a palindrome (33224242233).

The spelling of 20001132231 in words is "twenty billion, one million, one hundred thirty-two thousand, two hundred thirty-one".