20090605 has 8 divisors (see below), whose sum is σ = 24139872. Its totient is φ = 16051728.

The previous prime is 20090599. The next prime is 20090611. The reversal of 20090605 is 50609002.

It is an interprime number because it is at equal distance from previous prime (20090599) and next prime (20090611).

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 20090605 - 2⁹ = 20090093 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, 2614 + ... + 6856.

It is an arithmetic number, because the mean of its divisors is an integer number (3017484).

Almost surely, 2^20090605 is an apocalyptic number.

It is an amenable number.

20090605 is a deficient number, since it is larger than the sum of its proper divisors (4049267).

20090605 is an equidigital number, since it uses as much as digits as its factorization.

20090605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5195.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 20090605 is about 4482.2544550706. The cubic root of 20090605 is about 271.8510439102.

Adding to 20090605 its reverse (50609002), we get a palindrome (70699607).

The spelling of 20090605 in words is "twenty million, ninety thousand, six hundred five".