18477249388 has 24 divisors (see below), whose sum is σ = 34828561040. Its totient is φ = 8526479040.

The previous prime is 18477249383. The next prime is 18477249389. The reversal of 18477249388 is 88394277481.

It is not an unprimeable number, because it can be changed into a prime (18477249383) 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 in 7 ways as a sum of consecutive naturals, for example, 306223 + ... + 361561.

Almost surely, 2^18477249388 is an apocalyptic number.

It is an amenable number.

18477249388 is a deficient number, since it is larger than the sum of its proper divisors (16351311652).

18477249388 is a wasteful number, since it uses less digits than its factorization.

18477249388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61777 (or 61775 counting only the distinct ones).

The product of its digits is 21676032, while the sum is 61.

The spelling of 18477249388 in words is "eighteen billion, four hundred seventy-seven million, two hundred forty-nine thousand, three hundred eighty-eight".