20431043093 has 2 divisors, whose sum is σ = 20431043094. Its totient is φ = 20431043092.

The previous prime is 20431043089. The next prime is 20431043131. The reversal of 20431043093 is 39034013402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20368427524 + 62615569 = 142718^2 + 7913^2 .

It is a cyclic number.

It is not a de Polignac number, because 20431043093 - 2² = 20431043089 is a prime.

It is a super-3 number, since 3×20431043093³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20431003093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215521546 + 10215521547.

It is an arithmetic number, because the mean of its divisors is an integer number (10215521547).

Almost surely, 2^20431043093 is an apocalyptic number.

It is an amenable number.

20431043093 is a deficient number, since it is larger than the sum of its proper divisors (1).

20431043093 is an equidigital number, since it uses as much as digits as its factorization.

20431043093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 20431043093 its reverse (39034013402), we get a palindrome (59465056495).

The spelling of 20431043093 in words is "twenty billion, four hundred thirty-one million, forty-three thousand, ninety-three".