18531383348 has 6 divisors (see below), whose sum is σ = 32429920866. Its totient is φ = 9265691672.

The previous prime is 18531383347. The next prime is 18531383407. The reversal of 18531383348 is 84338313581.

It can be written as a sum of positive squares in only one way, i.e., 10496412304 + 8034971044 = 102452^2 + 89638^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18531383347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2316422915 + ... + 2316422922.

It is an arithmetic number, because the mean of its divisors is an integer number (5404986811).

Almost surely, 2^18531383348 is an apocalyptic number.

It is an amenable number.

18531383348 is a deficient number, since it is larger than the sum of its proper divisors (13898537518).

18531383348 is a wasteful number, since it uses less digits than its factorization.

18531383348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4632845841 (or 4632845839 counting only the distinct ones).

The product of its digits is 829440, while the sum is 47.

The spelling of 18531383348 in words is "eighteen billion, five hundred thirty-one million, three hundred eighty-three thousand, three hundred forty-eight".