20030056513 has 2 divisors, whose sum is σ = 20030056514. Its totient is φ = 20030056512.

The previous prime is 20030056511. The next prime is 20030056547. The reversal of 20030056513 is 31565003002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15743473729 + 4286582784 = 125473^2 + 65472^2 .

It is a cyclic number.

It is not a de Polignac number, because 20030056513 - 2¹ = 20030056511 is a prime.

Together with 20030056511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20030056511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10015028256 + 10015028257.

It is an arithmetic number, because the mean of its divisors is an integer number (10015028257).

Almost surely, 2^20030056513 is an apocalyptic number.

It is an amenable number.

20030056513 is a deficient number, since it is larger than the sum of its proper divisors (1).

20030056513 is an equidigital number, since it uses as much as digits as its factorization.

20030056513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 25.

Adding to 20030056513 its reverse (31565003002), we get a palindrome (51595059515).

The spelling of 20030056513 in words is "twenty billion, thirty million, fifty-six thousand, five hundred thirteen".