18219461882 has 4 divisors (see below), whose sum is σ = 27329192826. Its totient is φ = 9109730940.

The previous prime is 18219461873. The next prime is 18219461899. The reversal of 18219461882 is 28816491281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28816491281 = 33623 ⋅857047.

It can be written as a sum of positive squares in only one way, i.e., 10436869921 + 7782591961 = 102161^2 + 88219^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18219461882.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4554865469 + ... + 4554865472.

Almost surely, 2^18219461882 is an apocalyptic number.

18219461882 is a deficient number, since it is larger than the sum of its proper divisors (9109730944).

18219461882 is an equidigital number, since it uses as much as digits as its factorization.

18219461882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9109730943.

The product of its digits is 442368, while the sum is 50.

The spelling of 18219461882 in words is "eighteen billion, two hundred nineteen million, four hundred sixty-one thousand, eight hundred eighty-two".