20009466 has 12 divisors (see below), whose sum is σ = 43353882. Its totient is φ = 6669816.

The previous prime is 20009453. The next prime is 20009497. The reversal of 20009466 is 66490002.

It can be written as a sum of positive squares in only one way, i.e., 12006225 + 8003241 = 3465^2 + 2829^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 555801 + ... + 555836.

Almost surely, 2^20009466 is an apocalyptic number.

20009466 is an abundant number, since it is smaller than the sum of its proper divisors (23344416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20009466 is a wasteful number, since it uses less digits than its factorization.

20009466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111645 (or 1111642 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20009466 is about 4473.1941607759. The cubic root of 20009466 is about 271.4845793669.

Adding to 20009466 its reverse (66490002), we get a palindrome (86499468).

The spelling of 20009466 in words is "twenty million, nine thousand, four hundred sixty-six".