18986448 has 40 divisors (see below), whose sum is σ = 52823008. Its totient is φ = 5841792.

The previous prime is 18986447. The next prime is 18986483. The reversal of 18986448 is 84468981.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 18986397 and 18986406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18986441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14590 + ... + 15837.

Almost surely, 2^18986448 is an apocalyptic number.

It is an amenable number.

18986448 is an abundant number, since it is smaller than the sum of its proper divisors (33836560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18986448 is a wasteful number, since it uses less digits than its factorization.

18986448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30451 (or 30445 counting only the distinct ones).

The product of its digits is 442368, while the sum is 48.

The square root of 18986448 is about 4357.3441452334. The cubic root of 18986448 is about 266.7767073630.

The spelling of 18986448 in words is "eighteen million, nine hundred eighty-six thousand, four hundred forty-eight".