18244473 has 16 divisors (see below), whose sum is σ = 26273856. Its totient is φ = 11194560.

The previous prime is 18244469. The next prime is 18244531. The reversal of 18244473 is 37444281.

It is not a de Polignac number, because 18244473 - 2² = 18244469 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18244403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26058 + ... + 26748.

It is an arithmetic number, because the mean of its divisors is an integer number (1642116).

Almost surely, 2^18244473 is an apocalyptic number.

18244473 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18244473 is a deficient number, since it is larger than the sum of its proper divisors (8029383).

18244473 is a wasteful number, since it uses less digits than its factorization.

18244473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384.

The product of its digits is 21504, while the sum is 33.

The square root of 18244473 is about 4271.3549372535. The cubic root of 18244473 is about 263.2552904802.

The spelling of 18244473 in words is "eighteen million, two hundred forty-four thousand, four hundred seventy-three".