20000331231 has 4 divisors (see below), whose sum is σ = 26667108312. Its totient is φ = 13333554152.

The previous prime is 20000331229. The next prime is 20000331233. The reversal of 20000331231 is 13213300002.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20000331229) and next prime (20000331233).

It is a cyclic number.

It is not a de Polignac number, because 20000331231 - 2¹ = 20000331229 is a prime.

It is a super-2 number, since 2×20000331231² (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 20000331231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000331233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3333388536 + ... + 3333388541.

It is an arithmetic number, because the mean of its divisors is an integer number (6666777078).

Almost surely, 2^20000331231 is an apocalyptic number.

20000331231 is a deficient number, since it is larger than the sum of its proper divisors (6666777081).

20000331231 is an equidigital number, since it uses as much as digits as its factorization.

20000331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6666777080.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 20000331231 its reverse (13213300002), we get a palindrome (33213631233).

The spelling of 20000331231 in words is "twenty billion, three hundred thirty-one thousand, two hundred thirty-one".