18845493 has 8 divisors (see below), whose sum is σ = 25190400. Its totient is φ = 12532128.

The previous prime is 18845479. The next prime is 18845501. The reversal of 18845493 is 39454881.

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

It is a de Polignac number, because none of the positive numbers 2^k-18845493 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18845293) 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, 6453 + ... + 8906.

It is an arithmetic number, because the mean of its divisors is an integer number (3148800).

Almost surely, 2^18845493 is an apocalyptic number.

It is an amenable number.

18845493 is a deficient number, since it is larger than the sum of its proper divisors (6344907).

18845493 is a wasteful number, since it uses less digits than its factorization.

18845493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15771.

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

The square root of 18845493 is about 4341.1395969261. The cubic root of 18845493 is about 266.1148852676.

The spelling of 18845493 in words is "eighteen million, eight hundred forty-five thousand, four hundred ninety-three".