18806465 has 4 divisors (see below), whose sum is σ = 22567764. Its totient is φ = 15045168.

The previous prime is 18806453. The next prime is 18806497. The reversal of 18806465 is 56460881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56460881 = 2377 ⋅23753.

It can be written as a sum of positive squares in 2 ways, for example, as 8334769 + 10471696 = 2887^2 + 3236^2 .

It is a cyclic number.

It is not a de Polignac number, because 18806465 - 2⁸ = 18806209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1880642 + ... + 1880651.

It is an arithmetic number, because the mean of its divisors is an integer number (5641941).

Almost surely, 2^18806465 is an apocalyptic number.

It is an amenable number.

18806465 is a deficient number, since it is larger than the sum of its proper divisors (3761299).

18806465 is an equidigital number, since it uses as much as digits as its factorization.

18806465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3761298.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 18806465 is about 4336.6421341863. The cubic root of 18806465 is about 265.9310551148.

The spelling of 18806465 in words is "eighteen million, eight hundred six thousand, four hundred sixty-five".