18294804865 has 8 divisors (see below), whose sum is σ = 21959863848. Its totient is φ = 14631778560.

The previous prime is 18294804821. The next prime is 18294804893. The reversal of 18294804865 is 56840849281.

It can be written as a sum of positive squares in 4 ways, for example, as 2457085761 + 15837719104 = 49569^2 + 125848^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18294804865 - 2²³ = 18286416257 is a prime.

It is a Duffinian 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, 488296 + ... + 524425.

It is an arithmetic number, because the mean of its divisors is an integer number (2744982981).

Almost surely, 2^18294804865 is an apocalyptic number.

It is an amenable number.

18294804865 is a deficient number, since it is larger than the sum of its proper divisors (3665058983).

18294804865 is a wasteful number, since it uses less digits than its factorization.

18294804865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016339.

The product of its (nonzero) digits is 4423680, while the sum is 55.

The spelling of 18294804865 in words is "eighteen billion, two hundred ninety-four million, eight hundred four thousand, eight hundred sixty-five".