18984445 has 16 divisors (see below), whose sum is σ = 23242752. Its totient is φ = 14883840.

The previous prime is 18984443. The next prime is 18984451. The reversal of 18984445 is 54448981.

It is not a de Polignac number, because 18984445 - 2¹ = 18984443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18984443) 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, 98269 + ... + 98461.

It is an arithmetic number, because the mean of its divisors is an integer number (1452672).

Almost surely, 2^18984445 is an apocalyptic number.

It is an amenable number.

18984445 is a deficient number, since it is larger than the sum of its proper divisors (4258307).

18984445 is a wasteful number, since it uses less digits than its factorization.

18984445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492.

The product of its digits is 184320, while the sum is 43.

The square root of 18984445 is about 4357.1142973303. The cubic root of 18984445 is about 266.7673257146.

The spelling of 18984445 in words is "eighteen million, nine hundred eighty-four thousand, four hundred forty-five".