18768382240 has 24 divisors (see below), whose sum is σ = 44340303420. Its totient is φ = 7507352832.

The previous prime is 18768382223. The next prime is 18768382249. The reversal of 18768382240 is 4228386781.

It can be written as a sum of positive squares in 2 ways, for example, as 18064435216 + 703947024 = 134404^2 + 26532^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18768382249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58651035 + ... + 58651354.

Almost surely, 2^18768382240 is an apocalyptic number.

18768382240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18768382240 is an abundant number, since it is smaller than the sum of its proper divisors (25571921180).

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

18768382240 is a wasteful number, since it uses less digits than its factorization.

18768382240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117302404 (or 117302396 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 49.

The spelling of 18768382240 in words is "eighteen billion, seven hundred sixty-eight million, three hundred eighty-two thousand, two hundred forty".