20927469878784 has 1200 divisors, whose sum is σ = 73911403653120. Its totient is φ = 5877401886720.

The previous prime is 20927469878719. The next prime is 20927469878857. The reversal of 20927469878784 is 48787896472902.

20927469878784 is a `hidden beast` number, since 2 + 0 + 9 + 2 + 7 + 469 + 8 + 78 + 7 + 84 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 33808513227 + ... + 33808513845.

Almost surely, 2^{20927469878784} is an apocalyptic number.

20927469878784 is a gapful number since it is divisible by the number (24) 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 20927469878784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36955701826560).

20927469878784 is an abundant number, since it is smaller than the sum of its proper divisors (52983933774336).

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

20927469878784 is a wasteful number, since it uses less digits than its factorization.

20927469878784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921 (or 889 counting only the distinct ones).

The product of its (nonzero) digits is 5462360064, while the sum is 81.

The spelling of 20927469878784 in words is "twenty trillion, nine hundred twenty-seven billion, four hundred sixty-nine million, eight hundred seventy-eight thousand, seven hundred eighty-four".