18054477078 has 64 divisors (see below), whose sum is σ = 39701643264. Its totient is φ = 5428148000.

The previous prime is 18054477073. The next prime is 18054477079. The reversal of 18054477078 is 87077445081.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18054477078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18054477073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5431525 + ... + 5434847.

It is an arithmetic number, because the mean of its divisors is an integer number (620338176).

Almost surely, 2^18054477078 is an apocalyptic number.

18054477078 is an abundant number, since it is smaller than the sum of its proper divisors (21647166186).

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

18054477078 is a wasteful number, since it uses less digits than its factorization.

18054477078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3961.

The product of its (nonzero) digits is 1756160, while the sum is 51.

The spelling of 18054477078 in words is "eighteen billion, fifty-four million, four hundred seventy-seven thousand, seventy-eight".