20163305 has 8 divisors (see below), whose sum is σ = 24228672. Its totient is φ = 16108848.

The previous prime is 20163301. The next prime is 20163317. The reversal of 20163305 is 50336102.

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

It is a cyclic number.

It is not a de Polignac number, because 20163305 - 2² = 20163301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20163301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2132 + ... + 6698.

It is an arithmetic number, because the mean of its divisors is an integer number (3028584).

Almost surely, 2^20163305 is an apocalyptic number.

It is an amenable number.

20163305 is a deficient number, since it is larger than the sum of its proper divisors (4065367).

20163305 is an equidigital number, since it uses as much as digits as its factorization.

20163305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5455.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 20163305 is about 4490.3568900478. The cubic root of 20163305 is about 272.1785565268.

Adding to 20163305 its reverse (50336102), we get a palindrome (70499407).

The spelling of 20163305 in words is "twenty million, one hundred sixty-three thousand, three hundred five".