20650115 has 4 divisors (see below), whose sum is σ = 24780144. Its totient is φ = 16520088.

The previous prime is 20650099. The next prime is 20650127. The reversal of 20650115 is 51105602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51105602 = 2 ⋅25552801.

It is a cyclic number.

It is not a de Polignac number, because 20650115 - 2⁴ = 20650099 is a prime.

It is a Duffinian 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, 2065007 + ... + 2065016.

It is an arithmetic number, because the mean of its divisors is an integer number (6195036).

Almost surely, 2^20650115 is an apocalyptic number.

20650115 is a deficient number, since it is larger than the sum of its proper divisors (4130029).

20650115 is an equidigital number, since it uses as much as digits as its factorization.

20650115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4130028.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 20650115 is about 4544.2397604000. The cubic root of 20650115 is about 274.3515963420.

Adding to 20650115 its reverse (51105602), we get a palindrome (71755717).

The spelling of 20650115 in words is "twenty million, six hundred fifty thousand, one hundred fifteen".