20123130493 has 2 divisors, whose sum is σ = 20123130494. Its totient is φ = 20123130492.

The previous prime is 20123130487. The next prime is 20123130499. The reversal of 20123130493 is 39403132102.

It is a balanced prime because it is at equal distance from previous prime (20123130487) and next prime (20123130499).

It can be written as a sum of positive squares in only one way, i.e., 19448533764 + 674596729 = 139458^2 + 25973^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123130493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20123130499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061565246 + 10061565247.

It is an arithmetic number, because the mean of its divisors is an integer number (10061565247).

Almost surely, 2^20123130493 is an apocalyptic number.

It is an amenable number.

20123130493 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123130493 is an equidigital number, since it uses as much as digits as its factorization.

20123130493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 20123130493 its reverse (39403132102), we get a palindrome (59526262595).

The spelling of 20123130493 in words is "twenty billion, one hundred twenty-three million, one hundred thirty thousand, four hundred ninety-three".