18555685522 has 16 divisors (see below), whose sum is σ = 30936753792. Its totient is φ = 8275262320.

The previous prime is 18555685507. The next prime is 18555685601. The reversal of 18555685522 is 22558655581.

It is a self number, because there is not a number n which added to its sum of digits gives 18555685522.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7955818 + ... + 7958149.

It is an arithmetic number, because the mean of its divisors is an integer number (1933547112).

Almost surely, 2^18555685522 is an apocalyptic number.

18555685522 is a deficient number, since it is larger than the sum of its proper divisors (12381068270).

18555685522 is a wasteful number, since it uses less digits than its factorization.

18555685522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15914033.

The product of its digits is 4800000, while the sum is 52.

The spelling of 18555685522 in words is "eighteen billion, five hundred fifty-five million, six hundred eighty-five thousand, five hundred twenty-two".