18519888022 has 4 divisors (see below), whose sum is σ = 27779832036. Its totient is φ = 9259944010.

The previous prime is 18519888019. The next prime is 18519888047. The reversal of 18519888022 is 22088891581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22088891581 = 2999 ⋅7365419.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4629972004 + ... + 4629972007.

It is an arithmetic number, because the mean of its divisors is an integer number (6944958009).

Almost surely, 2^18519888022 is an apocalyptic number.

18519888022 is a deficient number, since it is larger than the sum of its proper divisors (9259944014).

18519888022 is an equidigital number, since it uses as much as digits as its factorization.

18519888022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9259944013.

The product of its (nonzero) digits is 737280, while the sum is 52.

The spelling of 18519888022 in words is "eighteen billion, five hundred nineteen million, eight hundred eighty-eight thousand, twenty-two".