18928206443 has 2 divisors, whose sum is σ = 18928206444. Its totient is φ = 18928206442.

The previous prime is 18928206403. The next prime is 18928206449. The reversal of 18928206443 is 34460282981.

It is a strong prime.

It is an emirp because it is prime and its reverse (34460282981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18928206443 - 2¹² = 18928202347 is a prime.

It is not a weakly prime, because it can be changed into another prime (18928206449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9464103221 + 9464103222.

It is an arithmetic number, because the mean of its divisors is an integer number (9464103222).

Almost surely, 2^18928206443 is an apocalyptic number.

18928206443 is a deficient number, since it is larger than the sum of its proper divisors (1).

18928206443 is an equidigital number, since it uses as much as digits as its factorization.

18928206443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 663552, while the sum is 47.

The spelling of 18928206443 in words is "eighteen billion, nine hundred twenty-eight million, two hundred six thousand, four hundred forty-three".