18512352240 has 80 divisors (see below), whose sum is σ = 59883452928. Its totient is φ = 4721989888.

The previous prime is 18512352227. The next prime is 18512352247. The reversal of 18512352240 is 4225321581.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18512352247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1671324 + ... + 1682363.

Almost surely, 2^18512352240 is an apocalyptic number.

18512352240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18512352240 is an abundant number, since it is smaller than the sum of its proper divisors (41371100688).

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

18512352240 is a wasteful number, since it uses less digits than its factorization.

18512352240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3353726 (or 3353720 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The spelling of 18512352240 in words is "eighteen billion, five hundred twelve million, three hundred fifty-two thousand, two hundred forty".