20205346 has 12 divisors (see below), whose sum is σ = 35256438. Its totient is φ = 8659392.

The previous prime is 20205343. The next prime is 20205371. The reversal of 20205346 is 64350202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15093225 + 5112121 = 3885^2 + 2261^2 .

It is not an unprimeable number, because it can be changed into a prime (20205343) 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 5 ways as a sum of consecutive naturals, for example, 102991 + ... + 103186.

Almost surely, 2^20205346 is an apocalyptic number.

20205346 is a deficient number, since it is larger than the sum of its proper divisors (15051092).

20205346 is a wasteful number, since it uses less digits than its factorization.

20205346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206193 (or 206186 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 20205346 is about 4495.0357061986. The cubic root of 20205346 is about 272.3675915941.

Adding to 20205346 its reverse (64350202), we get a palindrome (84555548).

The spelling of 20205346 in words is "twenty million, two hundred five thousand, three hundred forty-six".