18348945 has 8 divisors (see below), whose sum is σ = 29358336. Its totient is φ = 9786096.

The previous prime is 18348907. The next prime is 18348949. The reversal of 18348945 is 54984381.

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

It is not a de Polignac number, because 18348945 - 2⁶ = 18348881 is a prime.

It is a super-3 number, since 3×18348945³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 18348897 and 18348906.

It is not an unprimeable number, because it can be changed into a prime (18348949) 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, 611617 + ... + 611646.

It is an arithmetic number, because the mean of its divisors is an integer number (3669792).

Almost surely, 2^18348945 is an apocalyptic number.

18348945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18348945 is a deficient number, since it is larger than the sum of its proper divisors (11009391).

18348945 is a wasteful number, since it uses less digits than its factorization.

18348945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223271.

The product of its digits is 138240, while the sum is 42.

The square root of 18348945 is about 4283.5668548536. The cubic root of 18348945 is about 263.7568209492.

The spelling of 18348945 in words is "eighteen million, three hundred forty-eight thousand, nine hundred forty-five".