20632305 has 16 divisors (see below), whose sum is σ = 34953984. Its totient is φ = 10356480.

The previous prime is 20632301. The next prime is 20632327. The reversal of 20632305 is 50323602.

It is not a de Polignac number, because 20632305 - 2² = 20632301 is a prime.

It is a super-2 number, since 2×20632305² = 851384019226050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20632301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40201 + ... + 40710.

It is an arithmetic number, because the mean of its divisors is an integer number (2184624).

Almost surely, 2^20632305 is an apocalyptic number.

It is an amenable number.

20632305 is a deficient number, since it is larger than the sum of its proper divisors (14321679).

20632305 is a wasteful number, since it uses less digits than its factorization.

20632305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80936.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 20632305 is about 4542.2797139762. The cubic root of 20632305 is about 274.2727007792.

Adding to 20632305 its reverse (50323602), we get a palindrome (70955907).

The spelling of 20632305 in words is "twenty million, six hundred thirty-two thousand, three hundred five".