20625706 has 8 divisors (see below), whose sum is σ = 31693284. Its totient is φ = 10061280.

The previous prime is 20625691. The next prime is 20625707. The reversal of 20625706 is 60752602.

It can be written as a sum of positive squares in 2 ways, for example, as 17766225 + 2859481 = 4215^2 + 1691^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20625707) 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, 125685 + ... + 125848.

Almost surely, 2^20625706 is an apocalyptic number.

20625706 is a deficient number, since it is larger than the sum of its proper divisors (11067578).

20625706 is a wasteful number, since it uses less digits than its factorization.

20625706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251576.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20625706 is about 4541.5532585229. The cubic root of 20625706 is about 274.2434566958.

The spelling of 20625706 in words is "twenty million, six hundred twenty-five thousand, seven hundred six".