18213284409 has 16 divisors (see below), whose sum is σ = 24880914240. Its totient is φ = 11844023040.

The previous prime is 18213284399. The next prime is 18213284437. The reversal of 18213284409 is 90448231281.

It is not a de Polignac number, because 18213284409 - 2⁷ = 18213284281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18213284909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1140522 + ... + 1156380.

It is an arithmetic number, because the mean of its divisors is an integer number (1555057140).

Almost surely, 2^18213284409 is an apocalyptic number.

It is an amenable number.

18213284409 is a deficient number, since it is larger than the sum of its proper divisors (6667629831).

18213284409 is a wasteful number, since it uses less digits than its factorization.

18213284409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25240.

The product of its (nonzero) digits is 110592, while the sum is 42.

The spelling of 18213284409 in words is "eighteen billion, two hundred thirteen million, two hundred eighty-four thousand, four hundred nine".