18958249 has 8 divisors (see below), whose sum is σ = 19438848. Its totient is φ = 18480960.

The previous prime is 18958243. The next prime is 18958271. The reversal of 18958249 is 94285981.

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

It is a cyclic number.

It is not a de Polignac number, because 18958249 - 2³ = 18958241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18958199 and 18958208.

It is not an unprimeable number, because it can be changed into a prime (18958241) 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, 13969 + ... + 15265.

It is an arithmetic number, because the mean of its divisors is an integer number (2429856).

Almost surely, 2^18958249 is an apocalyptic number.

It is an amenable number.

18958249 is a deficient number, since it is larger than the sum of its proper divisors (480599).

18958249 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (18958248) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (1655).

18958249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655.

The product of its digits is 207360, while the sum is 46.

The square root of 18958249 is about 4354.1071415389. The cubic root of 18958249 is about 266.6445681340.

The spelling of 18958249 in words is "eighteen million, nine hundred fifty-eight thousand, two hundred forty-nine".