218106931486 has 16 divisors (see below), whose sum is σ = 332561433600. Its totient is φ = 107263618488.

The previous prime is 218106931481. The next prime is 218106931501. The reversal of 218106931486 is 684139601812.

It is a happy number.

218106931486 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218106931481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2582826 + ... + 2665933.

It is an arithmetic number, because the mean of its divisors is an integer number (20785089600).

Almost surely, 2^218106931486 is an apocalyptic number.

218106931486 is a deficient number, since it is larger than the sum of its proper divisors (114454502114).

218106931486 is a wasteful number, since it uses less digits than its factorization.

218106931486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5249103.

The product of its (nonzero) digits is 497664, while the sum is 49.

The spelling of 218106931486 in words is "two hundred eighteen billion, one hundred six million, nine hundred thirty-one thousand, four hundred eighty-six".