18201778113 has 8 divisors (see below), whose sum is σ = 24924957568. Its totient is φ = 11806558704.

The previous prime is 18201778103. The next prime is 18201778117. The reversal of 18201778113 is 31187710281.

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

It is not a de Polignac number, because 18201778113 - 2⁸ = 18201777857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18201778117) 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, 81989881 + ... + 81990102.

It is an arithmetic number, because the mean of its divisors is an integer number (3115619696).

Almost surely, 2^18201778113 is an apocalyptic number.

It is an amenable number.

18201778113 is a deficient number, since it is larger than the sum of its proper divisors (6723179455).

18201778113 is a wasteful number, since it uses less digits than its factorization.

18201778113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163980023.

The product of its (nonzero) digits is 18816, while the sum is 39.

The spelling of 18201778113 in words is "eighteen billion, two hundred one million, seven hundred seventy-eight thousand, one hundred thirteen".