18247783680 has 1296 divisors, whose sum is σ = 82228648320. Its totient is φ = 3790209024.

The previous prime is 18247783661. The next prime is 18247783681. The reversal of 18247783680 is 8638774281.

It is a happy number.

18247783680 is a `hidden beast` number, since 18 + 2 + 477 + 83 + 6 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (1296).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18247783681) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 629233906 + ... + 629233934.

Almost surely, 2^18247783680 is an apocalyptic number.

18247783680 is a gapful number since it is divisible by the number (10) 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 18247783680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41114324160).

18247783680 is an abundant number, since it is smaller than the sum of its proper divisors (63980864640).

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

18247783680 is an equidigital number, since it uses as much as digits as its factorization.

18247783680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The spelling of 18247783680 in words is "eighteen billion, two hundred forty-seven million, seven hundred eighty-three thousand, six hundred eighty".