20523522 has 16 divisors (see below), whose sum is σ = 43461792. Its totient is φ = 6438720.

The previous prime is 20523499. The next prime is 20523527. The reversal of 20523522 is 22532502.

It is not an unprimeable number, because it can be changed into a prime (20523527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100504 + ... + 100707.

It is an arithmetic number, because the mean of its divisors is an integer number (2716362).

Almost surely, 2^20523522 is an apocalyptic number.

20523522 is an abundant number, since it is smaller than the sum of its proper divisors (22938270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20523522 is a wasteful number, since it uses less digits than its factorization.

20523522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201233.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 20523522 is about 4530.2893947297. The cubic root of 20523522 is about 273.7898205245.

The spelling of 20523522 in words is "twenty million, five hundred twenty-three thousand, five hundred twenty-two".