18047219904 has 560 divisors, whose sum is σ = 64390926336. Its totient is φ = 4889548800.

The previous prime is 18047219903. The next prime is 18047219921. The reversal of 18047219904 is 40991274081.

It is a happy number.

18047219904 is a `hidden beast` number, since 1 + 80 + 472 + 19 + 90 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 18047219904.

It is not an unprimeable number, because it can be changed into a prime (18047219903) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 68620477 + ... + 68620739.

Almost surely, 2^18047219904 is an apocalyptic number.

18047219904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18047219904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32195463168).

18047219904 is an abundant number, since it is smaller than the sum of its proper divisors (46343706432).

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

18047219904 is a wasteful number, since it uses less digits than its factorization.

18047219904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 18047219904 in words is "eighteen billion, forty-seven million, two hundred nineteen thousand, nine hundred four".