20064145 has 4 divisors (see below), whose sum is σ = 24076980. Its totient is φ = 16051312.

The previous prime is 20064139. The next prime is 20064169. The reversal of 20064145 is 54146002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7447441 + 12616704 = 2729^2 + 3552^2 .

It is a cyclic number.

It is not a de Polignac number, because 20064145 - 2³ = 20064137 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2006410 + ... + 2006419.

It is an arithmetic number, because the mean of its divisors is an integer number (6019245).

Almost surely, 2^20064145 is an apocalyptic number.

It is an amenable number.

20064145 is a deficient number, since it is larger than the sum of its proper divisors (4012835).

20064145 is an equidigital number, since it uses as much as digits as its factorization.

20064145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4012834.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20064145 is about 4479.3018429215. The cubic root of 20064145 is about 271.7316458330.

The spelling of 20064145 in words is "twenty million, sixty-four thousand, one hundred forty-five".