18238569488 has 10 divisors (see below), whose sum is σ = 35337228414. Its totient is φ = 9119284736.

The previous prime is 18238569473. The next prime is 18238569491. The reversal of 18238569488 is 88496583281.

It can be written as a sum of positive squares in only one way, i.e., 12515344384 + 5723225104 = 111872^2 + 75652^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18238569488.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569955281 + ... + 569955312.

Almost surely, 2^18238569488 is an apocalyptic number.

It is an amenable number.

18238569488 is a deficient number, since it is larger than the sum of its proper divisors (17098658926).

18238569488 is a wasteful number, since it uses less digits than its factorization.

18238569488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139910601 (or 1139910595 counting only the distinct ones).

The product of its digits is 26542080, while the sum is 62.

The spelling of 18238569488 in words is "eighteen billion, two hundred thirty-eight million, five hundred sixty-nine thousand, four hundred eighty-eight".