18849493 has 8 divisors (see below), whose sum is σ = 20369888. Its totient is φ = 17339184.

The previous prime is 18849451. The next prime is 18849499. The reversal of 18849493 is 39494881.

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 18849493 - 2²¹ = 16752341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18849499) 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, 1630 + ... + 6352.

It is an arithmetic number, because the mean of its divisors is an integer number (2546236).

Almost surely, 2^18849493 is an apocalyptic number.

18849493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18849493 is a deficient number, since it is larger than the sum of its proper divisors (1520395).

18849493 is a wasteful number, since it uses less digits than its factorization.

18849493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5043.

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

The square root of 18849493 is about 4341.6002810024. The cubic root of 18849493 is about 266.1337117714.

The spelling of 18849493 in words is "eighteen million, eight hundred forty-nine thousand, four hundred ninety-three".