20066709 has 8 divisors (see below), whose sum is σ = 28813792. Its totient is φ = 12348720.

The previous prime is 20066707. The next prime is 20066719. The reversal of 20066709 is 90766002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20066709 - 2¹ = 20066707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20066707) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 257227 + ... + 257304.

It is an arithmetic number, because the mean of its divisors is an integer number (3601724).

Almost surely, 2^20066709 is an apocalyptic number.

It is an amenable number.

20066709 is a deficient number, since it is larger than the sum of its proper divisors (8747083).

20066709 is a wasteful number, since it uses less digits than its factorization.

20066709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514547.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 20066709 is about 4479.5880390947. The cubic root of 20066709 is about 271.7432202155.

The spelling of 20066709 in words is "twenty million, sixty-six thousand, seven hundred nine".