20100247513 has 2 divisors, whose sum is σ = 20100247514. Its totient is φ = 20100247512.

The previous prime is 20100247501. The next prime is 20100247523. The reversal of 20100247513 is 31574200102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14710778944 + 5389468569 = 121288^2 + 73413^2 .

It is a cyclic number.

It is not a de Polignac number, because 20100247513 - 2⁹ = 20100247001 is a prime.

It is not a weakly prime, because it can be changed into another prime (20100247523) 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 as a sum of consecutive naturals, namely, 10050123756 + 10050123757.

It is an arithmetic number, because the mean of its divisors is an integer number (10050123757).

Almost surely, 2^20100247513 is an apocalyptic number.

It is an amenable number.

20100247513 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100247513 is an equidigital number, since it uses as much as digits as its factorization.

20100247513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

Adding to 20100247513 its reverse (31574200102), we get a palindrome (51674447615).

The spelling of 20100247513 in words is "twenty billion, one hundred million, two hundred forty-seven thousand, five hundred thirteen".