18941005 has 8 divisors (see below), whose sum is σ = 23925600. Its totient is φ = 14355216.

The previous prime is 18940993. The next prime is 18941011. The reversal of 18941005 is 50014981.

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 18941005 - 2⁷ = 18940877 is a prime.

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, 99595 + ... + 99784.

It is an arithmetic number, because the mean of its divisors is an integer number (2990700).

Almost surely, 2^18941005 is an apocalyptic number.

It is an amenable number.

18941005 is a deficient number, since it is larger than the sum of its proper divisors (4984595).

18941005 is a wasteful number, since it uses less digits than its factorization.

18941005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199403.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 18941005 is about 4352.1264917279. The cubic root of 18941005 is about 266.5636989616.

Adding to 18941005 its reverse (50014981), we get a palindrome (68955986).

The spelling of 18941005 in words is "eighteen million, nine hundred forty-one thousand, five".