20798609547240 has 512 divisors, whose sum is σ = 79428615552000. Its totient is φ = 4742236274688.

The previous prime is 20798609547229. The next prime is 20798609547269. The reversal of 20798609547240 is 4274590689702.

20798609547240 is a `hidden beast` number, since 2 + 0 + 7 + 9 + 8 + 60 + 9 + 547 + 24 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6563144376 + ... + 6563147544.

It is an arithmetic number, because the mean of its divisors is an integer number (155134014750).

Almost surely, 2^{20798609547240} is an apocalyptic number.

20798609547240 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 20798609547240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39714307776000).

20798609547240 is an abundant number, since it is smaller than the sum of its proper divisors (58630006004760).

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

20798609547240 is a wasteful number, since it uses less digits than its factorization.

20798609547240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066 (or 5056 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 63.

The spelling of 20798609547240 in words is "twenty trillion, seven hundred ninety-eight billion, six hundred nine million, five hundred forty-seven thousand, two hundred forty".