18984345873 has 16 divisors (see below), whose sum is σ = 26288691840. Its totient is φ = 12175802496.

The previous prime is 18984345847. The next prime is 18984345883. The reversal of 18984345873 is 37854348981.

It is not a de Polignac number, because 18984345873 - 2⁵ = 18984345841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18984345803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 950965 + ... + 970722.

It is an arithmetic number, because the mean of its divisors is an integer number (1643043240).

Almost surely, 2^18984345873 is an apocalyptic number.

It is an amenable number.

18984345873 is a deficient number, since it is larger than the sum of its proper divisors (7304345967).

18984345873 is a wasteful number, since it uses less digits than its factorization.

18984345873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921816.

The product of its digits is 23224320, while the sum is 60.

The spelling of 18984345873 in words is "eighteen billion, nine hundred eighty-four million, three hundred forty-five thousand, eight hundred seventy-three".