20927145 has 16 divisors (see below), whose sum is σ = 33727680. Its totient is φ = 11079744.

The previous prime is 20927143. The next prime is 20927147. The reversal of 20927145 is 54172902.

It is an interprime number because it is at equal distance from previous prime (20927143) and next prime (20927147).

It is not a de Polignac number, because 20927145 - 2¹ = 20927143 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20927141) 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, 2934 + ... + 7103.

It is an arithmetic number, because the mean of its divisors is an integer number (2107980).

Almost surely, 2^20927145 is an apocalyptic number.

It is an amenable number.

20927145 is a deficient number, since it is larger than the sum of its proper divisors (12800535).

20927145 is a wasteful number, since it uses less digits than its factorization.

20927145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10184.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 20927145 is about 4574.6196563212. The cubic root of 20927145 is about 275.5729980926.

The spelling of 20927145 in words is "twenty million, nine hundred twenty-seven thousand, one hundred forty-five".