20549744572896 has 3456 divisors, whose sum is σ = 85830990336000. Its totient is φ = 4742499041280.

The previous prime is 20549744572837. The next prime is 20549744572921. The reversal of 20549744572896 is 69827544794502.

20549744572896 is a `hidden beast` number, since 2 + 0 + 5 + 4 + 9 + 7 + 44 + 572 + 8 + 9 + 6 = 666.

It is a super-2 number, since 2×20549744572896² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 199512083181 + ... + 199512083283.

It is an arithmetic number, because the mean of its divisors is an integer number (24835356000).

Almost surely, 2^{20549744572896} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20549744572896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42915495168000).

20549744572896 is an abundant number, since it is smaller than the sum of its proper divisors (65281245763104).

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

20549744572896 is a wasteful number, since it uses less digits than its factorization.

20549744572896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 1219276800, while the sum is 72.

The spelling of 20549744572896 in words is "twenty trillion, five hundred forty-nine billion, seven hundred forty-four million, five hundred seventy-two thousand, eight hundred ninety-six".