18889049 has 4 divisors (see below), whose sum is σ = 19710336. Its totient is φ = 18067764.

The previous prime is 18889037. The next prime is 18889051. The reversal of 18889049 is 94098881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18889049 - 2⁴ = 18889033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18888994 and 18889012.

It is not an unprimeable number, because it can be changed into a prime (18889009) 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, 410609 + ... + 410654.

It is an arithmetic number, because the mean of its divisors is an integer number (4927584).

Almost surely, 2^18889049 is an apocalyptic number.

It is an amenable number.

18889049 is a deficient number, since it is larger than the sum of its proper divisors (821287).

18889049 is an equidigital number, since it uses as much as digits as its factorization.

18889049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821286.

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 18889049 is about 4346.1533567052. The cubic root of 18889049 is about 266.3197438280.

The spelling of 18889049 in words is "eighteen million, eight hundred eighty-nine thousand, forty-nine".