20006605 has 8 divisors (see below), whose sum is σ = 24415200. Its totient is φ = 15733776.

The previous prime is 20006579. The next prime is 20006611. The reversal of 20006605 is 50660002.

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 20006605 - 2¹³ = 19998413 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, 33615 + ... + 34204.

It is an arithmetic number, because the mean of its divisors is an integer number (3051900).

Almost surely, 2^20006605 is an apocalyptic number.

It is an amenable number.

20006605 is a deficient number, since it is larger than the sum of its proper divisors (4408595).

20006605 is an equidigital number, since it uses as much as digits as its factorization.

20006605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67883.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20006605 is about 4472.8743554900. The cubic root of 20006605 is about 271.4716395846.

Adding to 20006605 its reverse (50660002), we get a palindrome (70666607).

The spelling of 20006605 in words is "twenty million, six thousand, six hundred five".