20895145 has 16 divisors (see below), whose sum is σ = 25701120. Its totient is φ = 16303104.

The previous prime is 20895143. The next prime is 20895163. The reversal of 20895145 is 54159802.

It is a cyclic number.

It is not a de Polignac number, because 20895145 - 2¹ = 20895143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20895145.

It is not an unprimeable number, because it can be changed into a prime (20895143) 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, 56752 + ... + 57118.

It is an arithmetic number, because the mean of its divisors is an integer number (1606320).

Almost surely, 2^20895145 is an apocalyptic number.

It is an amenable number.

20895145 is a deficient number, since it is larger than the sum of its proper divisors (4805975).

20895145 is a wasteful number, since it uses less digits than its factorization.

20895145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 20895145 is about 4571.1207597262. The cubic root of 20895145 is about 275.4324655528.

The spelling of 20895145 in words is "twenty million, eight hundred ninety-five thousand, one hundred forty-five".