20622805 has 16 divisors (see below), whose sum is σ = 28393344. Its totient is φ = 14086080.

The previous prime is 20622803. The next prime is 20622821. The reversal of 20622805 is 50822602.

It is not a de Polignac number, because 20622805 - 2¹ = 20622803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20622805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20622803) 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, 9250 + ... + 11260.

It is an arithmetic number, because the mean of its divisors is an integer number (1774584).

Almost surely, 2^20622805 is an apocalyptic number.

It is an amenable number.

20622805 is a deficient number, since it is larger than the sum of its proper divisors (7770539).

20622805 is a wasteful number, since it uses less digits than its factorization.

20622805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20622805 is about 4541.2338631698. The cubic root of 20622805 is about 274.2305986701.

The spelling of 20622805 in words is "twenty million, six hundred twenty-two thousand, eight hundred five".