20413424137 has 2 divisors, whose sum is σ = 20413424138. Its totient is φ = 20413424136.

The previous prime is 20413424111. The next prime is 20413424149. The reversal of 20413424137 is 73142431402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15329163721 + 5084260416 = 123811^2 + 71304^2 .

It is a cyclic number.

It is not a de Polignac number, because 20413424137 - 2²³ = 20405035529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20413424099 and 20413424108.

It is not a weakly prime, because it can be changed into another prime (20413424167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206712068 + 10206712069.

It is an arithmetic number, because the mean of its divisors is an integer number (10206712069).

Almost surely, 2^20413424137 is an apocalyptic number.

It is an amenable number.

20413424137 is a deficient number, since it is larger than the sum of its proper divisors (1).

20413424137 is an equidigital number, since it uses as much as digits as its factorization.

20413424137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

Adding to 20413424137 its reverse (73142431402), we get a palindrome (93555855539).

The spelling of 20413424137 in words is "twenty billion, four hundred thirteen million, four hundred twenty-four thousand, one hundred thirty-seven".