18983449 has 3 divisors (see below), whose sum is σ = 18987807. Its totient is φ = 18979092.

The previous prime is 18983423. The next prime is 18983467. The reversal of 18983449 is 94438981.

The square root of 18983449 is 4357.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 18966025 + 17424 = 4355^2 + 132^2 .

It is not a de Polignac number, because 18983449 - 2⁵ = 18983417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18983399 and 18983408.

It is not an unprimeable number, because it can be changed into a prime (18903449) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2179 + ... + 6535.

It is an arithmetic number, because the mean of its divisors is an integer number (6329269).

Almost surely, 2^18983449 is an apocalyptic number.

18983449 is the 4357-th square number.

18983449 is the 2179-th centered octagonal number.

It is an amenable number.

18983449 is a deficient number, since it is larger than the sum of its proper divisors (4358).

18983449 is an frugal number, since it uses more digits than its factorization.

18983449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8714 (or 4357 counting only the distinct ones).

The product of its digits is 248832, while the sum is 46.

The cubic root of 18983449 is about 266.7626604056.

It can be divided in two parts, 189 and 83449, that added together give a palindrome (83638).

The spelling of 18983449 in words is "eighteen million, nine hundred eighty-three thousand, four hundred forty-nine".