218418987432 has 32 divisors (see below), whose sum is σ = 551453885280. Its totient is φ = 72085473600.

The previous prime is 218418987431. The next prime is 218418987487. The reversal of 218418987432 is 234789814812.

It is not an unprimeable number, because it can be changed into a prime (218418987431) 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 7 ways as a sum of consecutive naturals, for example, 45050998 + ... + 45055845.

It is an arithmetic number, because the mean of its divisors is an integer number (17232933915).

Almost surely, 2^218418987432 is an apocalyptic number.

It is an amenable number.

218418987432 is an abundant number, since it is smaller than the sum of its proper divisors (333034897848).

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

218418987432 is a wasteful number, since it uses less digits than its factorization.

218418987432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90106953 (or 90106949 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 57.

The spelling of 218418987432 in words is "two hundred eighteen billion, four hundred eighteen million, nine hundred eighty-seven thousand, four hundred thirty-two".