18430389211 has 4 divisors (see below), whose sum is σ = 19848111472. Its totient is φ = 17012666952.

The previous prime is 18430389209. The next prime is 18430389217. The reversal of 18430389211 is 11298303481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18430389211 - 2¹ = 18430389209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18430389217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 708861111 + ... + 708861136.

It is an arithmetic number, because the mean of its divisors is an integer number (4962027868).

Almost surely, 2^18430389211 is an apocalyptic number.

18430389211 is a deficient number, since it is larger than the sum of its proper divisors (1417722261).

18430389211 is a wasteful number, since it uses less digits than its factorization.

18430389211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417722260.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 18430389211 in words is "eighteen billion, four hundred thirty million, three hundred eighty-nine thousand, two hundred eleven".