18849423 has 4 divisors (see below), whose sum is σ = 25132568. Its totient is φ = 12566280.

The previous prime is 18849409. The next prime is 18849431. The reversal of 18849423 is 32494881.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18849423 - 2⁴ = 18849407 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 (18849323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3141568 + ... + 3141573.

It is an arithmetic number, because the mean of its divisors is an integer number (6283142).

Almost surely, 2^18849423 is an apocalyptic number.

18849423 is a deficient number, since it is larger than the sum of its proper divisors (6283145).

18849423 is an equidigital number, since it uses as much as digits as its factorization.

18849423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6283144.

The product of its digits is 55296, while the sum is 39.

The square root of 18849423 is about 4341.5922194513. The cubic root of 18849423 is about 266.1333823305.

The spelling of 18849423 in words is "eighteen million, eight hundred forty-nine thousand, four hundred twenty-three".