20417072493440 has 256 divisors, whose sum is σ = 60064766438400. Its totient is φ = 6476697600000.

The previous prime is 20417072493401. The next prime is 20417072493443. The reversal of 20417072493440 is 4439427071402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20417072493443) 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 31 ways as a sum of consecutive naturals, for example, 2221565 + ... + 6765315.

It is an arithmetic number, because the mean of its divisors is an integer number (234627993900).

Almost surely, 2^{20417072493440} is an apocalyptic number.

20417072493440 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 20417072493440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30032383219200).

20417072493440 is an abundant number, since it is smaller than the sum of its proper divisors (39647693944960).

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

20417072493440 is a wasteful number, since it uses less digits than its factorization.

20417072493440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543853 (or 4543841 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 47.

The spelling of 20417072493440 in words is "twenty trillion, four hundred seventeen billion, seventy-two million, four hundred ninety-three thousand, four hundred forty".