20063728746 has 144 divisors (see below), whose sum is σ = 47674516032. Its totient is φ = 6075717120.

The previous prime is 20063728733. The next prime is 20063728747. The reversal of 20063728746 is 64782736002.

20063728746 is a `hidden beast` number, since 2 + 0 + 0 + 637 + 2 + 8 + 7 + 4 + 6 = 666.

It is a super-2 number, since 2×20063728746² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20063728747) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 76287811 + ... + 76288073.

It is an arithmetic number, because the mean of its divisors is an integer number (331073028).

Almost surely, 2^20063728746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20063728746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23837258016).

20063728746 is an abundant number, since it is smaller than the sum of its proper divisors (27610787286).

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

20063728746 is a wasteful number, since it uses less digits than its factorization.

20063728746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 20063728746 in words is "twenty billion, sixty-three million, seven hundred twenty-eight thousand, seven hundred forty-six".