18520601473259 has 2 divisors, whose sum is σ = 18520601473260. Its totient is φ = 18520601473258.

The previous prime is 18520601473183. The next prime is 18520601473261. The reversal of 18520601473259 is 95237410602581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18520601473259 - 2²⁸ = 18520333037803 is a prime.

It is a super-3 number, since 3×18520601473259³ (a number of 41 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 18520601473261, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18520601473259.

It is not a weakly prime, because it can be changed into another prime (18520601473159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9260300736629 + 9260300736630.

It is an arithmetic number, because the mean of its divisors is an integer number (9260300736630).

It is a 2-persistent number, because it is pandigital, and so is 2⋅18520601473259 = 37041202946518, but 3⋅18520601473259 = 55561804419777 is not.

Almost surely, 2^{18520601473259} is an apocalyptic number.

18520601473259 is a deficient number, since it is larger than the sum of its proper divisors (1).

18520601473259 is an equidigital number, since it uses as much as digits as its factorization.

18520601473259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3628800, while the sum is 53.

The spelling of 18520601473259 in words is "eighteen trillion, five hundred twenty billion, six hundred one million, four hundred seventy-three thousand, two hundred fifty-nine".