20850115 has 32 divisors (see below), whose sum is σ = 29760192. Its totient is φ = 13939200.

The previous prime is 20850113. The next prime is 20850131. The reversal of 20850115 is 51105802.

20850115 = T₁₁₂ + T₁₁₃ + ... + T₅₀₁.

It is not a de Polignac number, because 20850115 - 2¹ = 20850113 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20850113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86395 + ... + 86635.

It is an arithmetic number, because the mean of its divisors is an integer number (930006).

Almost surely, 2^20850115 is an apocalyptic number.

20850115 is a deficient number, since it is larger than the sum of its proper divisors (8910077).

20850115 is a wasteful number, since it uses less digits than its factorization.

20850115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 20850115 is about 4566.1926152978. The cubic root of 20850115 is about 275.2344667021.

Adding to 20850115 its reverse (51105802), we get a palindrome (71955917).

The spelling of 20850115 in words is "twenty million, eight hundred fifty thousand, one hundred fifteen".