20067305 has 4 divisors (see below), whose sum is σ = 24080772. Its totient is φ = 16053840.

The previous prime is 20067301. The next prime is 20067317. The reversal of 20067305 is 50376002.

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 14055001 + 6012304 = 3749^2 + 2452^2 .

It is not a de Polignac number, because 20067305 - 2² = 20067301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20067301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2006726 + ... + 2006735.

It is an arithmetic number, because the mean of its divisors is an integer number (6020193).

Almost surely, 2^20067305 is an apocalyptic number.

It is an amenable number.

20067305 is a deficient number, since it is larger than the sum of its proper divisors (4013467).

20067305 is an equidigital number, since it uses as much as digits as its factorization.

20067305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4013466.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 20067305 is about 4479.6545625751. The cubic root of 20067305 is about 271.7459105314.

The spelling of 20067305 in words is "twenty million, sixty-seven thousand, three hundred five".