18499499481 has 8 divisors (see below), whose sum is σ = 24667407904. Its totient is φ = 12332295360.

The previous prime is 18499499477. The next prime is 18499499507.

18499499481 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18499499481 - 2² = 18499499477 is a prime.

It is a super-3 number, since 3×18499499481³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18499499411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111391 + ... + 222276.

It is an arithmetic number, because the mean of its divisors is an integer number (3083425988).

Almost surely, 2^18499499481 is an apocalyptic number.

It is an amenable number.

18499499481 is a deficient number, since it is larger than the sum of its proper divisors (6167908423).

18499499481 is a wasteful number, since it uses less digits than its factorization.

18499499481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352151.

The product of its digits is 26873856, while the sum is 66.

The spelling of 18499499481 in words is "eighteen billion, four hundred ninety-nine million, four hundred ninety-nine thousand, four hundred eighty-one".