18181696063 has 16 divisors (see below), whose sum is σ = 18929154816. Its totient is φ = 17451645120.

The previous prime is 18181696021. The next prime is 18181696079. The reversal of 18181696063 is 36069618181.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18181696063 - 2¹³ = 18181687871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18181695998 and 18181696016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18181696003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564531 + ... + 595867.

It is an arithmetic number, because the mean of its divisors is an integer number (1183072176).

Almost surely, 2^18181696063 is an apocalyptic number.

18181696063 is a deficient number, since it is larger than the sum of its proper divisors (747458753).

18181696063 is a wasteful number, since it uses less digits than its factorization.

18181696063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31614.

The product of its (nonzero) digits is 373248, while the sum is 49.

The spelling of 18181696063 in words is "eighteen billion, one hundred eighty-one million, six hundred ninety-six thousand, sixty-three".