18465446865 has 32 divisors (see below), whose sum is σ = 29655613440. Its totient is φ = 9811336896.

The previous prime is 18465446833. The next prime is 18465446893. The reversal of 18465446865 is 56864456481.

It is not a de Polignac number, because 18465446865 - 2⁵ = 18465446833 is a prime.

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, 8380854 + ... + 8383056.

It is an arithmetic number, because the mean of its divisors is an integer number (926737920).

Almost surely, 2^18465446865 is an apocalyptic number.

18465446865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18465446865 is a deficient number, since it is larger than the sum of its proper divisors (11190166575).

18465446865 is a wasteful number, since it uses less digits than its factorization.

18465446865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4053.

The product of its digits is 22118400, while the sum is 57.

The spelling of 18465446865 in words is "eighteen billion, four hundred sixty-five million, four hundred forty-six thousand, eight hundred sixty-five".