18980605223 has 4 divisors (see below), whose sum is σ = 18987298440. Its totient is φ = 18973912008.

The previous prime is 18980605219. The next prime is 18980605249. The reversal of 18980605223 is 32250608981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32250608981 = 127 ⋅253941803.

It is a cyclic number.

It is not a de Polignac number, because 18980605223 - 2² = 18980605219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18980607223) 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 3 ways as a sum of consecutive naturals, for example, 3342353 + ... + 3348026.

It is an arithmetic number, because the mean of its divisors is an integer number (4746824610).

Almost surely, 2^18980605223 is an apocalyptic number.

18980605223 is a deficient number, since it is larger than the sum of its proper divisors (6693217).

18980605223 is an equidigital number, since it uses as much as digits as its factorization.

18980605223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6693216.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 18980605223 in words is "eighteen billion, nine hundred eighty million, six hundred five thousand, two hundred twenty-three".