18518516870 has 16 divisors (see below), whose sum is σ = 38095234848. Its totient is φ = 6349205760.

The previous prime is 18518516867. The next prime is 18518516881. The reversal of 18518516870 is 7861581581.

It is a Curzon number.

It is a congruent number.

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, 132275051 + ... + 132275190.

It is an arithmetic number, because the mean of its divisors is an integer number (2380952178).

Almost surely, 2^18518516870 is an apocalyptic number.

18518516870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18518516870 is an abundant number, since it is smaller than the sum of its proper divisors (19576717978).

18518516870 is a wasteful number, since it uses less digits than its factorization.

18518516870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264550255.

The product of its (nonzero) digits is 537600, while the sum is 50.

The spelling of 18518516870 in words is "eighteen billion, five hundred eighteen million, five hundred sixteen thousand, eight hundred seventy".