18220456466 has 8 divisors (see below), whose sum is σ = 27331787964. Its totient is φ = 9109860480.

The previous prime is 18220456439. The next prime is 18220456483. The reversal of 18220456466 is 66465402281.

It can be written as a sum of positive squares in 2 ways, for example, as 17621235025 + 599221441 = 132745^2 + 24479^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117095 + ... + 223946.

Almost surely, 2^18220456466 is an apocalyptic number.

18220456466 is a deficient number, since it is larger than the sum of its proper divisors (9111331498).

18220456466 is a wasteful number, since it uses less digits than its factorization.

18220456466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367756.

The product of its (nonzero) digits is 552960, while the sum is 44.

The spelling of 18220456466 in words is "eighteen billion, two hundred twenty million, four hundred fifty-six thousand, four hundred sixty-six".