18849583872 has 504 divisors, whose sum is σ = 66057632256. Its totient is φ = 5253838848.

The previous prime is 18849583861. The next prime is 18849583913. The reversal of 18849583872 is 27838594881.

18849583872 is a `hidden beast` number, since 1 + 8 + 8 + 49 + 583 + 8 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (504).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 61399143 + ... + 61399449.

Almost surely, 2^18849583872 is an apocalyptic number.

18849583872 is a gapful number since it is divisible by the number (12) 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 18849583872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33028816128).

18849583872 is an abundant number, since it is smaller than the sum of its proper divisors (47208048384).

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

18849583872 is an frugal number, since it uses more digits than its factorization.

18849583872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 366 counting only the distinct ones).

The product of its digits is 30965760, while the sum is 63.

The spelling of 18849583872 in words is "eighteen billion, eight hundred forty-nine million, five hundred eighty-three thousand, eight hundred seventy-two".