20063789820 has 144 divisors (see below), whose sum is σ = 61360685568. Its totient is φ = 5306526720.

The previous prime is 20063789791. The next prime is 20063789821. The reversal of 20063789820 is 2898736002.

20063789820 is a `hidden beast` number, since 2 + 0 + 0 + 637 + 8 + 9 + 8 + 2 + 0 = 666.

It is a super-2 number, since 2×20063789820² (a number of 21 digits) contains 22 as substring.

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 (20063789821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15711022 + ... + 15712298.

It is an arithmetic number, because the mean of its divisors is an integer number (426115872).

Almost surely, 2^20063789820 is an apocalyptic number.

20063789820 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 20063789820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30680342784).

20063789820 is an abundant number, since it is smaller than the sum of its proper divisors (41296895748).

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

20063789820 is a wasteful number, since it uses less digits than its factorization.

20063789820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940 (or 1935 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 20063789820 in words is "twenty billion, sixty-three million, seven hundred eighty-nine thousand, eight hundred twenty".