20545306 has 8 divisors (see below), whose sum is σ = 30906324. Its totient is φ = 10243200.

The previous prime is 20545303. The next prime is 20545309. The reversal of 20545306 is 60354502.

It is an interprime number because it is at equal distance from previous prime (20545303) and next prime (20545309).

It can be written as a sum of positive squares in 2 ways, for example, as 17514225 + 3031081 = 4185^2 + 1741^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20545303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13845 + ... + 15256.

Almost surely, 2^20545306 is an apocalyptic number.

20545306 is a deficient number, since it is larger than the sum of its proper divisors (10361018).

20545306 is a wasteful number, since it uses less digits than its factorization.

20545306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29456.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 20545306 is about 4532.6930185046. The cubic root of 20545306 is about 273.8866545948.

Adding to 20545306 its reverse (60354502), we get a palindrome (80899808).

The spelling of 20545306 in words is "twenty million, five hundred forty-five thousand, three hundred six".