18872218555 has 16 divisors (see below), whose sum is σ = 23216523264. Its totient is φ = 14720312800.

The previous prime is 18872218513. The next prime is 18872218571. The reversal of 18872218555 is 55581227881.

It is a happy number.

It is not a de Polignac number, because 18872218555 - 2⁷ = 18872218427 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90871 + ... + 214480.

It is an arithmetic number, because the mean of its divisors is an integer number (1451032704).

Almost surely, 2^18872218555 is an apocalyptic number.

18872218555 is a deficient number, since it is larger than the sum of its proper divisors (4344304709).

18872218555 is a wasteful number, since it uses less digits than its factorization.

18872218555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305666.

The product of its digits is 1792000, while the sum is 52.

The spelling of 18872218555 in words is "eighteen billion, eight hundred seventy-two million, two hundred eighteen thousand, five hundred fifty-five".