67520220013 has 2 divisors, whose sum is σ = 67520220014. Its totient is φ = 67520220012.

The previous prime is 67520219989. The next prime is 67520220017. The reversal of 67520220013 is 31002202576.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54139051684 + 13381168329 = 232678^2 + 115677^2 .

It is a cyclic number.

It is not a de Polignac number, because 67520220013 - 2²⁵ = 67486665581 is a prime.

It is a super-2 number, since 2×67520220013² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67520220017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33760110006 + 33760110007.

It is an arithmetic number, because the mean of its divisors is an integer number (33760110007).

Almost surely, 2^67520220013 is an apocalyptic number.

It is an amenable number.

67520220013 is a deficient number, since it is larger than the sum of its proper divisors (1).

67520220013 is an equidigital number, since it uses as much as digits as its factorization.

67520220013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

Adding to 67520220013 its reverse (31002202576), we get a palindrome (98522422589).

The spelling of 67520220013 in words is "sixty-seven billion, five hundred twenty million, two hundred twenty thousand, thirteen".