20306105 has 8 divisors (see below), whose sum is σ = 24934272. Its totient is φ = 15866928.

The previous prime is 20306063. The next prime is 20306113. The reversal of 20306105 is 50160302.

20306105 = 331² + 332² + ... + 459².

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 20306105 - 2²⁰ = 19257529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47009 + ... + 47438.

It is an arithmetic number, because the mean of its divisors is an integer number (3116784).

Almost surely, 2^20306105 is an apocalyptic number.

It is an amenable number.

20306105 is a deficient number, since it is larger than the sum of its proper divisors (4628167).

20306105 is an equidigital number, since it uses as much as digits as its factorization.

20306105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94495.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 20306105 is about 4506.2295769301. The cubic root of 20306105 is about 272.8195840881.

Adding to 20306105 its reverse (50160302), we get a palindrome (70466407).

The spelling of 20306105 in words is "twenty million, three hundred six thousand, one hundred five".