20784476160 has 624 divisors, whose sum is σ = 83721193920. Its totient is φ = 4671406080.

The previous prime is 20784476149. The next prime is 20784476161. The reversal of 20784476160 is 6167448702.

20784476160 is a `hidden beast` number, since 20 + 7 + 8 + 4 + 4 + 7 + 616 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20784476161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 114831270 + ... + 114831450.

It is an arithmetic number, because the mean of its divisors is an integer number (134168580).

Almost surely, 2^20784476160 is an apocalyptic number.

20784476160 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 20784476160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41860596960).

20784476160 is an abundant number, since it is smaller than the sum of its proper divisors (62936717760).

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

20784476160 is a wasteful number, since it uses less digits than its factorization.

20784476160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 20784476160 in words is "twenty billion, seven hundred eighty-four million, four hundred seventy-six thousand, one hundred sixty".