18396718461 has 40 divisors (see below), whose sum is σ = 30946975488. Its totient is φ = 10789848000.

The previous prime is 18396718343. The next prime is 18396718471. The reversal of 18396718461 is 16481769381.

18396718461 is a `hidden beast` number, since 1 + 83 + 96 + 7 + 18 + 461 = 666.

It is not a de Polignac number, because 18396718461 - 2¹⁵ = 18396685693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18396718398 and 18396718407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18396718471) 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 39 ways as a sum of consecutive naturals, for example, 305400 + ... + 360641.

Almost surely, 2^18396718461 is an apocalyptic number.

18396718461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18396718461 is a deficient number, since it is larger than the sum of its proper divisors (12550257027).

18396718461 is a wasteful number, since it uses less digits than its factorization.

18396718461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666095 (or 666086 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The spelling of 18396718461 in words is "eighteen billion, three hundred ninety-six million, seven hundred eighteen thousand, four hundred sixty-one".