20009606 has 16 divisors (see below), whose sum is σ = 30481920. Its totient is φ = 9850440.

The previous prime is 20009597. The next prime is 20009611. The reversal of 20009606 is 60690002.

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, 46211 + ... + 46641.

It is an arithmetic number, because the mean of its divisors is an integer number (1905120).

Almost surely, 2^20009606 is an apocalyptic number.

20009606 is a deficient number, since it is larger than the sum of its proper divisors (10472314).

20009606 is a wasteful number, since it uses less digits than its factorization.

20009606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 20009606 is about 4473.2098095216. The cubic root of 20009606 is about 271.4852125298.

Adding to 20009606 its reverse (60690002), we get a palindrome (80699608).

The spelling of 20009606 in words is "twenty million, nine thousand, six hundred six".