18782154648 has 96 divisors (see below), whose sum is σ = 51550705440. Its totient is φ = 6177185280.

The previous prime is 18782154641. The next prime is 18782154673. The reversal of 18782154648 is 84645128781.

18782154648 is a `hidden beast` number, since 1 + 8 + 78 + 21 + 546 + 4 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 18782154594 and 18782154603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18782154641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2079390 + ... + 2088402.

It is an arithmetic number, because the mean of its divisors is an integer number (536986515).

Almost surely, 2^18782154648 is an apocalyptic number.

18782154648 is a gapful number since it is divisible by the number (18) 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 18782154648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25775352720).

18782154648 is an abundant number, since it is smaller than the sum of its proper divisors (32768550792).

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

18782154648 is a wasteful number, since it uses less digits than its factorization.

18782154648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9409 (or 9402 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 54.

The spelling of 18782154648 in words is "eighteen billion, seven hundred eighty-two million, one hundred fifty-four thousand, six hundred forty-eight".