18488593897 has 2 divisors, whose sum is σ = 18488593898. Its totient is φ = 18488593896.

The previous prime is 18488593873. The next prime is 18488593919. The reversal of 18488593897 is 79839588481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15045720921 + 3442872976 = 122661^2 + 58676^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18488593897 is a prime.

It is not a weakly prime, because it can be changed into another prime (18488593817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9244296948 + 9244296949.

It is an arithmetic number, because the mean of its divisors is an integer number (9244296949).

Almost surely, 2^18488593897 is an apocalyptic number.

It is an amenable number.

18488593897 is a deficient number, since it is larger than the sum of its proper divisors (1).

18488593897 is an equidigital number, since it uses as much as digits as its factorization.

18488593897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139345920, while the sum is 70.

The spelling of 18488593897 in words is "eighteen billion, four hundred eighty-eight million, five hundred ninety-three thousand, eight hundred ninety-seven".