20324202122440 has 32 divisors (see below), whose sum is σ = 48419422705080. Its totient is φ = 7651464328192.

The previous prime is 20324202122437. The next prime is 20324202122461. The reversal of 20324202122440 is 4422120242302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20324173798756 + 28323684 = 4508234^2 + 5322^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20324202122399 and 20324202122408.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14944265587 + ... + 14944266946.

Almost surely, 2^{20324202122440} is an apocalyptic number.

20324202122440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20324202122440 is an abundant number, since it is smaller than the sum of its proper divisors (28095220582640).

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

20324202122440 is a wasteful number, since it uses less digits than its factorization.

20324202122440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29888532561 (or 29888532557 counting only the distinct ones).

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

Adding to 20324202122440 its reverse (4422120242302), we get a palindrome (24746322364742).

The spelling of 20324202122440 in words is "twenty trillion, three hundred twenty-four billion, two hundred two million, one hundred twenty-two thousand, four hundred forty".