218387452742 has 4 divisors (see below), whose sum is σ = 327581179116. Its totient is φ = 109193726370.

The previous prime is 218387452681. The next prime is 218387452747. The reversal of 218387452742 is 247254783812.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218387452747) 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 as a sum of consecutive naturals, namely, 54596863184 + ... + 54596863187.

It is an arithmetic number, because the mean of its divisors is an integer number (81895294779).

Almost surely, 2^218387452742 is an apocalyptic number.

218387452742 is a deficient number, since it is larger than the sum of its proper divisors (109193726374).

218387452742 is a wasteful number, since it uses less digits than its factorization.

218387452742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109193726373.

The product of its digits is 6021120, while the sum is 53.

The spelling of 218387452742 in words is "two hundred eighteen billion, three hundred eighty-seven million, four hundred fifty-two thousand, seven hundred forty-two".