218072427894 has 12 divisors (see below), whose sum is σ = 472490260476. Its totient is φ = 72690809292.

The previous prime is 218072427893. The next prime is 218072427901. The reversal of 218072427894 is 498724270812.

218072427894 is a `hidden beast` number, since 218 + 0 + 72 + 4 + 278 + 94 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 218072427894.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218072427893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6057567424 + ... + 6057567459.

It is an arithmetic number, because the mean of its divisors is an integer number (39374188373).

Almost surely, 2^218072427894 is an apocalyptic number.

218072427894 is an abundant number, since it is smaller than the sum of its proper divisors (254417832582).

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

218072427894 is a wasteful number, since it uses less digits than its factorization.

218072427894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12115134891 (or 12115134888 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The spelling of 218072427894 in words is "two hundred eighteen billion, seventy-two million, four hundred twenty-seven thousand, eight hundred ninety-four".