18874463 has 4 divisors (see below), whose sum is σ = 19313448. Its totient is φ = 18435480.

The previous prime is 18874459. The next prime is 18874481. The reversal of 18874463 is 36447881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36447881 = 17 ⋅2143993.

It is a cyclic number.

It is not a de Polignac number, because 18874463 - 2² = 18874459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18874463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18874423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219428 + ... + 219513.

It is an arithmetic number, because the mean of its divisors is an integer number (4828362).

Almost surely, 2^18874463 is an apocalyptic number.

18874463 is a deficient number, since it is larger than the sum of its proper divisors (438985).

18874463 is an equidigital number, since it uses as much as digits as its factorization.

18874463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438984.

The product of its digits is 129024, while the sum is 41.

The square root of 18874463 is about 4344.4749970509. The cubic root of 18874463 is about 266.2511760548.

The spelling of 18874463 in words is "eighteen million, eight hundred seventy-four thousand, four hundred sixty-three".