20605046 has 32 divisors (see below), whose sum is σ = 39128832. Its totient is φ = 7904160.

The previous prime is 20605043. The next prime is 20605069. The reversal of 20605046 is 64050602.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20605043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9320 + ... + 11316.

It is an arithmetic number, because the mean of its divisors is an integer number (1222776).

Almost surely, 2^20605046 is an apocalyptic number.

20605046 is a deficient number, since it is larger than the sum of its proper divisors (18523786).

20605046 is a wasteful number, since it uses less digits than its factorization.

20605046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20605046 is about 4539.2781364442. The cubic root of 20605046 is about 274.1518596270.

Adding to 20605046 its reverse (64050602), we get a palindrome (84655648).

The spelling of 20605046 in words is "twenty million, six hundred five thousand, forty-six".