18645049 has 8 divisors (see below), whose sum is σ = 18966528. Its totient is φ = 18326400.

The previous prime is 18645047. The next prime is 18645059. The reversal of 18645049 is 94054681.

It is a happy number.

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 18645049 - 2¹ = 18645047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18644999 and 18645017.

It is not an unprimeable number, because it can be changed into a prime (18645047) 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, 15624 + ... + 16774.

It is an arithmetic number, because the mean of its divisors is an integer number (2370816).

Almost surely, 2^18645049 is an apocalyptic number.

It is an amenable number.

18645049 is a deficient number, since it is larger than the sum of its proper divisors (321479).

18645049 is a wasteful number, since it uses less digits than its factorization.

18645049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 18645049 is about 4317.9913154151. The cubic root of 18645049 is about 265.1680386702.

The spelling of 18645049 in words is "eighteen million, six hundred forty-five thousand, forty-nine".