20205466 has 4 divisors (see below), whose sum is σ = 30308202. Its totient is φ = 10102732.

The previous prime is 20205389. The next prime is 20205467. The reversal of 20205466 is 66450202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20205025 + 441 = 4495^2 + 21^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20205466.

It is not an unprimeable number, because it can be changed into a prime (20205467) 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 as a sum of consecutive naturals, namely, 5051365 + ... + 5051368.

Almost surely, 2^20205466 is an apocalyptic number.

20205466 is a deficient number, since it is larger than the sum of its proper divisors (10102736).

20205466 is a wasteful number, since it uses less digits than its factorization.

20205466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10102735.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20205466 is about 4495.0490542373. The cubic root of 20205466 is about 272.3681307921.

Adding to 20205466 its reverse (66450202), we get a palindrome (86655668).

The spelling of 20205466 in words is "twenty million, two hundred five thousand, four hundred sixty-six".