20852115 has 16 divisors (see below), whose sum is σ = 35326368. Its totient is φ = 10466816.

The previous prime is 20852113. The next prime is 20852123. The reversal of 20852115 is 51125802.

It is a cyclic number.

It is not a de Polignac number, because 20852115 - 2¹ = 20852113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20852113) 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, 40632 + ... + 41141.

It is an arithmetic number, because the mean of its divisors is an integer number (2207898).

Almost surely, 2^20852115 is an apocalyptic number.

20852115 is a deficient number, since it is larger than the sum of its proper divisors (14474253).

20852115 is a wasteful number, since it uses less digits than its factorization.

20852115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81798.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 20852115 is about 4566.4116108822. The cubic root of 20852115 is about 275.2432668347.

Adding to 20852115 its reverse (51125802), we get a palindrome (71977917).

The spelling of 20852115 in words is "twenty million, eight hundred fifty-two thousand, one hundred fifteen".