20466445 has 4 divisors (see below), whose sum is σ = 24559740. Its totient is φ = 16373152.

The previous prime is 20466437. The next prime is 20466461. The reversal of 20466445 is 54466402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9156676 + 11309769 = 3026^2 + 3363^2 .

It is a cyclic number.

It is not a de Polignac number, because 20466445 - 2³ = 20466437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2046640 + ... + 2046649.

It is an arithmetic number, because the mean of its divisors is an integer number (6139935).

Almost surely, 2^20466445 is an apocalyptic number.

It is an amenable number.

20466445 is a deficient number, since it is larger than the sum of its proper divisors (4093295).

20466445 is an equidigital number, since it uses as much as digits as its factorization.

20466445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4093294.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 20466445 is about 4523.9855216391. The cubic root of 20466445 is about 273.5357768861.

The spelling of 20466445 in words is "twenty million, four hundred sixty-six thousand, four hundred forty-five".