18871474 has 8 divisors (see below), whose sum is σ = 28511280. Its totient is φ = 9367716.

The previous prime is 18871469. The next prime is 18871481. The reversal of 18871474 is 47417881.

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

It is a super-2 number, since 2×18871474² = 712265061865352, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33664 + ... + 34219.

It is an arithmetic number, because the mean of its divisors is an integer number (3563910).

Almost surely, 2^18871474 is an apocalyptic number.

18871474 is a deficient number, since it is larger than the sum of its proper divisors (9639806).

18871474 is a wasteful number, since it uses less digits than its factorization.

18871474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68024.

The product of its digits is 50176, while the sum is 40.

The square root of 18871474 is about 4344.1309832923. The cubic root of 18871474 is about 266.2371206125.

The spelling of 18871474 in words is "eighteen million, eight hundred seventy-one thousand, four hundred seventy-four".