18930998443 has 6 divisors (see below), whose sum is σ = 22021773756. Its totient is φ = 16226570052.

The previous prime is 18930998419. The next prime is 18930998453. The reversal of 18930998443 is 34489903981.

It is not a de Polignac number, because 18930998443 - 2⁹ = 18930997931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18930998453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 193173405 + ... + 193173502.

It is an arithmetic number, because the mean of its divisors is an integer number (3670295626).

Almost surely, 2^18930998443 is an apocalyptic number.

18930998443 is a deficient number, since it is larger than the sum of its proper divisors (3090775313).

18930998443 is an equidigital number, since it uses as much as digits as its factorization.

18930998443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386346921 (or 386346914 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 18930998443 in words is "eighteen billion, nine hundred thirty million, nine hundred ninety-eight thousand, four hundred forty-three".