18604049 has 4 divisors (see below), whose sum is σ = 18614820. Its totient is φ = 18593280.

The previous prime is 18604039. The next prime is 18604063. The reversal of 18604049 is 94040681.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7924225 + 10679824 = 2815^2 + 3268^2 .

It is a cyclic number.

It is not a de Polignac number, because 18604049 - 2¹² = 18599953 is a prime.

It is a super-2 number, since 2×18604049² = 692221278388802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18604009) 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, 2144 + ... + 6465.

It is an arithmetic number, because the mean of its divisors is an integer number (4653705).

Almost surely, 2^18604049 is an apocalyptic number.

It is an amenable number.

18604049 is a deficient number, since it is larger than the sum of its proper divisors (10771).

18604049 is an equidigital number, since it uses as much as digits as its factorization.

18604049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10770.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 18604049 is about 4313.2411247228. The cubic root of 18604049 is about 264.9735300486.

The spelling of 18604049 in words is "eighteen million, six hundred four thousand, forty-nine".