20321253522 has 12 divisors (see below), whose sum is σ = 44029382670. Its totient is φ = 6773751168.

The previous prime is 20321253509. The next prime is 20321253529. The reversal of 20321253522 is 22535212302.

It can be written as a sum of positive squares in only one way, i.e., 13845993561 + 6475259961 = 117669^2 + 80469^2 .

It is not an unprimeable number, because it can be changed into a prime (20321253529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 564479247 + ... + 564479282.

Almost surely, 2^20321253522 is an apocalyptic number.

20321253522 is an abundant number, since it is smaller than the sum of its proper divisors (23708129148).

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

20321253522 is a wasteful number, since it uses less digits than its factorization.

20321253522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128958537 (or 1128958534 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 20321253522 its reverse (22535212302), we get a palindrome (42856465824).

The spelling of 20321253522 in words is "twenty billion, three hundred twenty-one million, two hundred fifty-three thousand, five hundred twenty-two".