18348649 has 8 divisors (see below), whose sum is σ = 20050848. Its totient is φ = 16652160.

The previous prime is 18348643. The next prime is 18348667. The reversal of 18348649 is 94684381.

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 18348649 - 2⁷ = 18348521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18348643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8089 + ... + 10105.

It is an arithmetic number, because the mean of its divisors is an integer number (2506356).

Almost surely, 2^18348649 is an apocalyptic number.

It is an amenable number.

18348649 is a deficient number, since it is larger than the sum of its proper divisors (1702199).

18348649 is a wasteful number, since it uses less digits than its factorization.

18348649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2855.

The product of its digits is 165888, while the sum is 43.

The square root of 18348649 is about 4283.5323040687. The cubic root of 18348649 is about 263.7554026581.

The spelling of 18348649 in words is "eighteen million, three hundred forty-eight thousand, six hundred forty-nine".