20201324204440 has 64 divisors (see below), whose sum is σ = 47038762584000. Its totient is φ = 7798831219200.

The previous prime is 20201324204437. The next prime is 20201324204447. The reversal of 20201324204440 is 4440242310202.

It is a super-2 number, since 2×20201324204440² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20201324204399 and 20201324204408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201324204447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454195 + ... + 6372514.

It is an arithmetic number, because the mean of its divisors is an integer number (734980665375).

Almost surely, 2^{20201324204440} is an apocalyptic number.

20201324204440 is a gapful number since it is divisible by the number (20) 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 20201324204440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23519381292000).

20201324204440 is an abundant number, since it is smaller than the sum of its proper divisors (26837438379560).

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

20201324204440 is a wasteful number, since it uses less digits than its factorization.

20201324204440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6829300 (or 6829296 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 20201324204440 its reverse (4440242310202), we get a palindrome (24641566514642).

The spelling of 20201324204440 in words is "twenty trillion, two hundred one billion, three hundred twenty-four million, two hundred four thousand, four hundred forty".