20895115 has 4 divisors (see below), whose sum is σ = 25074144. Its totient is φ = 16716088.

The previous prime is 20895107. The next prime is 20895139. The reversal of 20895115 is 51159802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20895115 - 2³ = 20895107 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2089507 + ... + 2089516.

It is an arithmetic number, because the mean of its divisors is an integer number (6268536).

Almost surely, 2^20895115 is an apocalyptic number.

20895115 is a deficient number, since it is larger than the sum of its proper divisors (4179029).

20895115 is an equidigital number, since it uses as much as digits as its factorization.

20895115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179028.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 20895115 is about 4571.1174782541. The cubic root of 20895115 is about 275.4323337363.

The spelling of 20895115 in words is "twenty million, eight hundred ninety-five thousand, one hundred fifteen".