20323522 has 4 divisors (see below), whose sum is σ = 30485286. Its totient is φ = 10161760.

The previous prime is 20323489. The next prime is 20323529. The reversal of 20323522 is 22532302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17464041 + 2859481 = 4179^2 + 1691^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20323522.

It is not an unprimeable number, because it can be changed into a prime (20323529) 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 as a sum of consecutive naturals, namely, 5080879 + ... + 5080882.

Almost surely, 2^20323522 is an apocalyptic number.

20323522 is a deficient number, since it is larger than the sum of its proper divisors (10161764).

20323522 is a wasteful number, since it uses less digits than its factorization.

20323522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10161763.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 20323522 is about 4508.1617096107. The cubic root of 20323522 is about 272.8975629487.

Adding to 20323522 its reverse (22532302), we get a palindrome (42855824).

The spelling of 20323522 in words is "twenty million, three hundred twenty-three thousand, five hundred twenty-two".