19443466855 has 12 divisors (see below), whose sum is σ = 23375183832. Its totient is φ = 15526143680.

The previous prime is 19443466843. The next prime is 19443466909. The reversal of 19443466855 is 55866434491.

It is not a de Polignac number, because 19443466855 - 2¹³ = 19443458663 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19443466796 and 19443466805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1612800 + ... + 1624810.

It is an arithmetic number, because the mean of its divisors is an integer number (1947931986).

Almost surely, 2^19443466855 is an apocalyptic number.

19443466855 is a deficient number, since it is larger than the sum of its proper divisors (3931716977).

19443466855 is an frugal number, since it uses more digits than its factorization.

19443466855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13154 (or 12585 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 55.

The spelling of 19443466855 in words is "nineteen billion, four hundred forty-three million, four hundred sixty-six thousand, eight hundred fifty-five".