20047205 has 16 divisors (see below), whose sum is σ = 24624000. Its totient is φ = 15664320.

The previous prime is 20047201. The next prime is 20047241. The reversal of 20047205 is 50274002.

It is not a de Polignac number, because 20047205 - 2² = 20047201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20047201) 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 15 ways as a sum of consecutive naturals, for example, 52706 + ... + 53084.

It is an arithmetic number, because the mean of its divisors is an integer number (1539000).

Almost surely, 2^20047205 is an apocalyptic number.

It is an amenable number.

20047205 is a deficient number, since it is larger than the sum of its proper divisors (4576795).

20047205 is a wasteful number, since it uses less digits than its factorization.

20047205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 20047205 is about 4477.4105239524. The cubic root of 20047205 is about 271.6551506696.

The spelling of 20047205 in words is "twenty million, forty-seven thousand, two hundred five".