18658049 has 8 divisors (see below), whose sum is σ = 19521000. Its totient is φ = 17809792.

The previous prime is 18658043. The next prime is 18658069. The reversal of 18658049 is 94085681.

It can be written as a sum of positive squares in 4 ways, for example, as 6091024 + 12567025 = 2468^2 + 3545^2 .

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 18658049 - 2²⁴ = 1880833 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18657997 and 18658015.

It is not an unprimeable number, because it can be changed into a prime (18658043) 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, 1034 + ... + 6195.

It is an arithmetic number, because the mean of its divisors is an integer number (2440125).

Almost surely, 2^18658049 is an apocalyptic number.

It is an amenable number.

18658049 is a deficient number, since it is larger than the sum of its proper divisors (862951).

18658049 is an equidigital number, since it uses as much as digits as its factorization.

18658049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7347.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 18658049 is about 4319.4963826817. The cubic root of 18658049 is about 265.2296525897.

The spelling of 18658049 in words is "eighteen million, six hundred fifty-eight thousand, forty-nine".