18890006 has 8 divisors (see below), whose sum is σ = 28693920. Its totient is φ = 9325368.

The previous prime is 18889999. The next prime is 18890021. The reversal of 18890006 is 60009881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59621 + ... + 59936.

It is an arithmetic number, because the mean of its divisors is an integer number (3586740).

Almost surely, 2^18890006 is an apocalyptic number.

18890006 is a deficient number, since it is larger than the sum of its proper divisors (9803914).

18890006 is a wasteful number, since it uses less digits than its factorization.

18890006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119638.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 18890006 is about 4346.2634526683. The cubic root of 18890006 is about 266.3242413845.

Adding to 18890006 its reverse (60009881), we get a palindrome (78899887).

The spelling of 18890006 in words is "eighteen million, eight hundred ninety thousand, six".