18641005 has 8 divisors (see below), whose sum is σ = 22578912. Its totient is φ = 14773008.

The previous prime is 18640987. The next prime is 18641011. The reversal of 18641005 is 50014681.

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 18641005 - 2⁷ = 18640877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16887 + ... + 17956.

It is an arithmetic number, because the mean of its divisors is an integer number (2822364).

Almost surely, 2^18641005 is an apocalyptic number.

It is an amenable number.

18641005 is a deficient number, since it is larger than the sum of its proper divisors (3937907).

18641005 is a wasteful number, since it uses less digits than its factorization.

18641005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34955.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 18641005 is about 4317.5230167308. The cubic root of 18641005 is about 265.1488661616.

Adding to 18641005 its reverse (50014681), we get a palindrome (68655686).

The spelling of 18641005 in words is "eighteen million, six hundred forty-one thousand, five".