18487297057 has 2 divisors, whose sum is σ = 18487297058. Its totient is φ = 18487297056.

The previous prime is 18487297007. The next prime is 18487297079. The reversal of 18487297057 is 75079278481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12649725841 + 5837571216 = 112471^2 + 76404^2 .

It is a cyclic number.

It is not a de Polignac number, because 18487297057 - 2⁷ = 18487296929 is a prime.

It is a super-2 number, since 2×18487297057² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18487296992 and 18487297010.

It is not a weakly prime, because it can be changed into another prime (18487297007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9243648528 + 9243648529.

It is an arithmetic number, because the mean of its divisors is an integer number (9243648529).

Almost surely, 2^18487297057 is an apocalyptic number.

It is an amenable number.

18487297057 is a deficient number, since it is larger than the sum of its proper divisors (1).

18487297057 is an equidigital number, since it uses as much as digits as its factorization.

18487297057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7902720, while the sum is 58.

The spelling of 18487297057 in words is "eighteen billion, four hundred eighty-seven million, two hundred ninety-seven thousand, fifty-seven".