20236522 has 4 divisors (see below), whose sum is σ = 30354786. Its totient is φ = 10118260.

The previous prime is 20236507. The next prime is 20236523. The reversal of 20236522 is 22563202.

It is a happy number.

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., 11350161 + 8886361 = 3369^2 + 2981^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20236493 and 20236502.

It is not an unprimeable number, because it can be changed into a prime (20236523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5059129 + ... + 5059132.

Almost surely, 2^20236522 is an apocalyptic number.

20236522 is a deficient number, since it is larger than the sum of its proper divisors (10118264).

20236522 is a wasteful number, since it uses less digits than its factorization.

20236522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10118263.

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

The square root of 20236522 is about 4498.5021951756. The cubic root of 20236522 is about 272.5076035249.

Adding to 20236522 its reverse (22563202), we get a palindrome (42799724).

The spelling of 20236522 in words is "twenty million, two hundred thirty-six thousand, five hundred twenty-two".