18874869 has 8 divisors (see below), whose sum is σ = 27102432. Its totient is φ = 11615280.

The previous prime is 18874859. The next prime is 18874897. The reversal of 18874869 is 96847881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18874869 - 2⁷ = 18874741 is a prime.

It is a super-2 number, since 2×18874869² = 712521359534322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18874859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241947 + ... + 242024.

It is an arithmetic number, because the mean of its divisors is an integer number (3387804).

Almost surely, 2^18874869 is an apocalyptic number.

It is an amenable number.

18874869 is a deficient number, since it is larger than the sum of its proper divisors (8227563).

18874869 is a wasteful number, since it uses less digits than its factorization.

18874869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483987.

The product of its digits is 774144, while the sum is 51.

The square root of 18874869 is about 4344.5217228137. The cubic root of 18874869 is about 266.2530851105.

It can be divided in two parts, 188 and 74869, that added together give a palindrome (75057).

The spelling of 18874869 in words is "eighteen million, eight hundred seventy-four thousand, eight hundred sixty-nine".