2218072187842 has 16 divisors (see below), whose sum is σ = 3841609564800. Its totient is φ = 940802341248.

The previous prime is 2218072187839. The next prime is 2218072187879. The reversal of 2218072187842 is 2487812708122.

It is a self number, because there is not a number n which added to its sum of digits gives 2218072187842.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 816667342 + ... + 816670057.

It is an arithmetic number, because the mean of its divisors is an integer number (240100597800).

Almost surely, 2^{2218072187842} is an apocalyptic number.

2218072187842 is a deficient number, since it is larger than the sum of its proper divisors (1623537376958).

2218072187842 is a wasteful number, since it uses less digits than its factorization.

2218072187842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633337505.

The product of its (nonzero) digits is 1605632, while the sum is 52.

The spelling of 2218072187842 in words is "two trillion, two hundred eighteen billion, seventy-two million, one hundred eighty-seven thousand, eight hundred forty-two".