18874369 has 16 divisors (see below), whose sum is σ = 20651328. Its totient is φ = 17183232.

The previous prime is 18874367. The next prime is 18874379. The reversal of 18874369 is 96347881.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18874369 - 2¹ = 18874367 is a prime.

It is a super-2 number, since 2×18874369² = 712483610296322, which contains 22 as substring.

Its product of digits (290304) is a multiple of the sum of its prime divisors (384).

It is not an unprimeable number, because it can be changed into a prime (18874363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83034 + ... + 83260.

It is an arithmetic number, because the mean of its divisors is an integer number (1290708).

It is a Proth number, since it is equal to 9 ⋅ 2²¹ + 1 and 9 < 2²¹.

Almost surely, 2^18874369 is an apocalyptic number.

It is an amenable number.

18874369 is a deficient number, since it is larger than the sum of its proper divisors (1776959).

18874369 is a wasteful number, since it uses less digits than its factorization.

18874369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384.

The product of its digits is 290304, while the sum is 46.

The square root of 18874369 is about 4344.4641786991. The cubic root of 18874369 is about 266.2507340528.

The spelling of 18874369 in words is "eighteen million, eight hundred seventy-four thousand, three hundred sixty-nine".