18682613690 has 24 divisors (see below), whose sum is σ = 36414517788. Its totient is φ = 6898195200.

The previous prime is 18682613689. The next prime is 18682613707. The reversal of 18682613690 is 9631628681.

It can be written as a sum of positive squares in 6 ways, for example, as 41899729 + 18640713961 = 6473^2 + 136531^2 .

It is a super-2 number, since 2×18682613690² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 5525711 + ... + 5529090.

Almost surely, 2^18682613690 is an apocalyptic number.

18682613690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18682613690 is a deficient number, since it is larger than the sum of its proper divisors (17731904098).

18682613690 is a wasteful number, since it uses less digits than its factorization.

18682613690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11054834 (or 11054821 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 18682613690 in words is "eighteen billion, six hundred eighty-two million, six hundred thirteen thousand, six hundred ninety".