20078972584 has 64 divisors (see below), whose sum is σ = 43041248640. Its totient is φ = 8692316160.

The previous prime is 20078972581. The next prime is 20078972611. The reversal of 20078972584 is 48527987002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20078972581) 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 15 ways as a sum of consecutive naturals, for example, 450304 + ... + 492880.

It is an arithmetic number, because the mean of its divisors is an integer number (672519510).

Almost surely, 2^20078972584 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 20078972584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21520624320).

20078972584 is an abundant number, since it is smaller than the sum of its proper divisors (22962276056).

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

20078972584 is a wasteful number, since it uses less digits than its factorization.

20078972584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42850 (or 42846 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 52.

The spelling of 20078972584 in words is "twenty billion, seventy-eight million, nine hundred seventy-two thousand, five hundred eighty-four".