20532440424 has 64 divisors (see below), whose sum is σ = 52213176000. Its totient is φ = 6726712320.

The previous prime is 20532440381. The next prime is 20532440429. The reversal of 20532440424 is 42404423502.

It is a super-2 number, since 2×20532440424² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20532440391 and 20532440400.

It is not an unprimeable number, because it can be changed into a prime (20532440429) 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 15 ways as a sum of consecutive naturals, for example, 2175187 + ... + 2184605.

It is an arithmetic number, because the mean of its divisors is an integer number (815830875).

Almost surely, 2^20532440424 is an apocalyptic number.

20532440424 is a gapful number since it is divisible by the number (24) 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 20532440424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26106588000).

20532440424 is an abundant number, since it is smaller than the sum of its proper divisors (31680735576).

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

20532440424 is a wasteful number, since it uses less digits than its factorization.

20532440424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10978 (or 10974 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 30.

Adding to 20532440424 its reverse (42404423502), we get a palindrome (62936863926).

The spelling of 20532440424 in words is "twenty billion, five hundred thirty-two million, four hundred forty thousand, four hundred twenty-four".