18840647382 has 16 divisors (see below), whose sum is σ = 38699708592. Its totient is φ = 6110480160.

The previous prime is 18840647381. The next prime is 18840647411. The reversal of 18840647382 is 28374604881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18840647381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42433669 + ... + 42434112.

It is an arithmetic number, because the mean of its divisors is an integer number (2418731787).

Almost surely, 2^18840647382 is an apocalyptic number.

18840647382 is an abundant number, since it is smaller than the sum of its proper divisors (19859061210).

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

18840647382 is a wasteful number, since it uses less digits than its factorization.

18840647382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84867823.

The product of its (nonzero) digits is 2064384, while the sum is 51.

The spelling of 18840647382 in words is "eighteen billion, eight hundred forty million, six hundred forty-seven thousand, three hundred eighty-two".