20522211504432 has 160 divisors (see below), whose sum is σ = 58199216083200. Its totient is φ = 6179735669760.

The previous prime is 20522211504367. The next prime is 20522211504437. The reversal of 20522211504432 is 23440511222502.

It is a super-2 number, since 2×20522211504432² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 20522211504393 and 20522211504402.

It is not an unprimeable number, because it can be changed into a prime (20522211504437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 708894694 + ... + 708923642.

It is an arithmetic number, because the mean of its divisors is an integer number (363745100520).

Almost surely, 2^{20522211504432} is an apocalyptic number.

20522211504432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20522211504432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29099608041600).

20522211504432 is an abundant number, since it is smaller than the sum of its proper divisors (37677004578768).

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

20522211504432 is a wasteful number, since it uses less digits than its factorization.

20522211504432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37371 (or 37365 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 20522211504432 its reverse (23440511222502), we get a palindrome (43962722726934).

The spelling of 20522211504432 in words is "twenty trillion, five hundred twenty-two billion, two hundred eleven million, five hundred four thousand, four hundred thirty-two".