18487736357 has 2 divisors, whose sum is σ = 18487736358. Its totient is φ = 18487736356.

The previous prime is 18487736347. The next prime is 18487736417. The reversal of 18487736357 is 75363778481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15882552676 + 2605183681 = 126026^2 + 51041^2 .

It is an emirp because it is prime and its reverse (75363778481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18487736357 - 2¹⁶ = 18487670821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18487736296 and 18487736305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18487736327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9243868178 + 9243868179.

It is an arithmetic number, because the mean of its divisors is an integer number (9243868179).

Almost surely, 2^18487736357 is an apocalyptic number.

It is an amenable number.

18487736357 is a deficient number, since it is larger than the sum of its proper divisors (1).

18487736357 is an equidigital number, since it uses as much as digits as its factorization.

18487736357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23708160, while the sum is 59.

The spelling of 18487736357 in words is "eighteen billion, four hundred eighty-seven million, seven hundred thirty-six thousand, three hundred fifty-seven".