18870518555 has 32 divisors (see below), whose sum is σ = 27436462080. Its totient is φ = 12183903360.

The previous prime is 18870518549. The next prime is 18870518593. The reversal of 18870518555 is 55581507881.

It is not a de Polignac number, because 18870518555 - 2¹² = 18870514459 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18870518497 and 18870518506.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 194885 + ... + 275174.

It is an arithmetic number, because the mean of its divisors is an integer number (857389440).

Almost surely, 2^18870518555 is an apocalyptic number.

18870518555 is a deficient number, since it is larger than the sum of its proper divisors (8565943525).

18870518555 is a wasteful number, since it uses less digits than its factorization.

18870518555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470139.

The product of its (nonzero) digits is 2240000, while the sum is 53.

The spelling of 18870518555 in words is "eighteen billion, eight hundred seventy million, five hundred eighteen thousand, five hundred fifty-five".