20047439782872 has 256 divisors, whose sum is σ = 57198310963200. Its totient is φ = 6502856048640.

The previous prime is 20047439782859. The next prime is 20047439782879. The reversal of 20047439782872 is 27828793474002.

It is a happy number.

20047439782872 is a `hidden beast` number, since 2 + 0 + 0 + 47 + 439 + 7 + 82 + 87 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20047439782879) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2469804958 + ... + 2469813074.

It is an arithmetic number, because the mean of its divisors is an integer number (223430902200).

Almost surely, 2^{20047439782872} 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 20047439782872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28599155481600).

20047439782872 is an abundant number, since it is smaller than the sum of its proper divisors (37150871180328).

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

20047439782872 is a wasteful number, since it uses less digits than its factorization.

20047439782872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9543 (or 9533 counting only the distinct ones).

The product of its (nonzero) digits is 75866112, while the sum is 63.

The spelling of 20047439782872 in words is "twenty trillion, forty-seven billion, four hundred thirty-nine million, seven hundred eighty-two thousand, eight hundred seventy-two".