20466605 has 16 divisors (see below), whose sum is σ = 25574400. Its totient is φ = 15704640.

The previous prime is 20466601. The next prime is 20466613. The reversal of 20466605 is 50666402.

It is not a de Polignac number, because 20466605 - 2² = 20466601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20466601) 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, 27326 + ... + 28064.

It is an arithmetic number, because the mean of its divisors is an integer number (1598400).

Almost surely, 2^20466605 is an apocalyptic number.

It is an amenable number.

20466605 is a deficient number, since it is larger than the sum of its proper divisors (5107795).

20466605 is a wasteful number, since it uses less digits than its factorization.

20466605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 20466605 is about 4524.0032051271. The cubic root of 20466605 is about 273.5364896887.

Subtracting from 20466605 its sum of digits (29), we obtain a square (20466576 = 4524²).

The spelling of 20466605 in words is "twenty million, four hundred sixty-six thousand, six hundred five".