18948947178 has 16 divisors (see below), whose sum is σ = 43311879360. Its totient is φ = 5413984896.

The previous prime is 18948947177. The next prime is 18948947197. The reversal of 18948947178 is 87174984981.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18948947177) 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, 225582663 + ... + 225582746.

It is an arithmetic number, because the mean of its divisors is an integer number (2706992460).

Almost surely, 2^18948947178 is an apocalyptic number.

18948947178 is an abundant number, since it is smaller than the sum of its proper divisors (24362932182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18948947178 is a wasteful number, since it uses less digits than its factorization.

18948947178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451165421.

The product of its digits is 32514048, while the sum is 66.

The spelling of 18948947178 in words is "eighteen billion, nine hundred forty-eight million, nine hundred forty-seven thousand, one hundred seventy-eight".