20000231012997 has 6 divisors (see below), whose sum is σ = 28889222574342. Its totient is φ = 13333487341992.

The previous prime is 20000231012987. The next prime is 20000231012999. The reversal of 20000231012997 is 79921013200002.

It can be written as a sum of positive squares in only one way, i.e., 19113562072836 + 886668940161 = 4371906^2 + 941631^2 .

It is not a de Polignac number, because 20000231012997 - 2⁴ = 20000231012981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000231012999) 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 5 ways as a sum of consecutive naturals, for example, 1111123945158 + ... + 1111123945175.

It is an arithmetic number, because the mean of its divisors is an integer number (4814870429057).

Almost surely, 2^{20000231012997} is an apocalyptic number.

It is an amenable number.

20000231012997 is a deficient number, since it is larger than the sum of its proper divisors (8888991561345).

20000231012997 is a wasteful number, since it uses less digits than its factorization.

20000231012997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222247890339 (or 2222247890336 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

Adding to 20000231012997 its reverse (79921013200002), we get a palindrome (99921244212999).

The spelling of 20000231012997 in words is "twenty trillion, two hundred thirty-one million, twelve thousand, nine hundred ninety-seven".