18051287904 has 144 divisors (see below), whose sum is σ = 55378486800. Its totient is φ = 5544557568.

The previous prime is 18051287843. The next prime is 18051287927. The reversal of 18051287904 is 40978215081.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 18051287904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2313642 + ... + 2321430.

It is an arithmetic number, because the mean of its divisors is an integer number (384572825).

Almost surely, 2^18051287904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18051287904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27689243400).

18051287904 is an abundant number, since it is smaller than the sum of its proper divisors (37327198896).

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

18051287904 is a wasteful number, since it uses less digits than its factorization.

18051287904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8437 (or 8426 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 18051287904 in words is "eighteen billion, fifty-one million, two hundred eighty-seven thousand, nine hundred four".