20717990092800 has 5376 divisors, whose sum is σ = 108120879820800. Its totient is φ = 3745618329600.

The previous prime is 20717990092739. The next prime is 20717990092817. The reversal of 20717990092800 is 829009971702.

20717990092800 is a `hidden beast` number, since 207 + 1 + 79 + 90 + 0 + 9 + 280 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (5376).

It is a super-2 number, since 2×20717990092800² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 105167462302 + ... + 105167462498.

It is an arithmetic number, because the mean of its divisors is an integer number (20111770800).

Almost surely, 2^{20717990092800} is an apocalyptic number.

20717990092800 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 20717990092800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54060439910400).

20717990092800 is an abundant number, since it is smaller than the sum of its proper divisors (87402889728000).

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

20717990092800 is a wasteful number, since it uses less digits than its factorization.

20717990092800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The spelling of 20717990092800 in words is "twenty trillion, seven hundred seventeen billion, nine hundred ninety million, ninety-two thousand, eight hundred".