18748869 has 8 divisors (see below), whose sum is σ = 25020480. Its totient is φ = 12488256.

The previous prime is 18748859. The next prime is 18748871. The reversal of 18748869 is 96884781.

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

It is not a de Polignac number, because 18748869 - 2⁴ = 18748853 is a prime.

It is a super-2 number, since 2×18748869² = 703040177558322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18748859) 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, 2877 + ... + 6765.

It is an arithmetic number, because the mean of its divisors is an integer number (3127560).

Almost surely, 2^18748869 is an apocalyptic number.

It is an amenable number.

18748869 is a deficient number, since it is larger than the sum of its proper divisors (6271611).

18748869 is a wasteful number, since it uses less digits than its factorization.

18748869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5499.

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

The square root of 18748869 is about 4329.9964203218. The cubic root of 18748869 is about 265.6593005578.

The spelling of 18748869 in words is "eighteen million, seven hundred forty-eight thousand, eight hundred sixty-nine".