20016979892 has 72 divisors (see below), whose sum is σ = 43944981696. Its totient is φ = 7810193664.

The previous prime is 20016979889. The next prime is 20016979897. The reversal of 20016979892 is 29897961002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20016979897) 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 23 ways as a sum of consecutive naturals, for example, 316463 + ... + 374409.

It is an arithmetic number, because the mean of its divisors is an integer number (610346968).

Almost surely, 2^20016979892 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 20016979892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21972490848).

20016979892 is an abundant number, since it is smaller than the sum of its proper divisors (23928001804).

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

20016979892 is a wasteful number, since it uses less digits than its factorization.

20016979892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58057 (or 58042 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 53.

The spelling of 20016979892 in words is "twenty billion, sixteen million, nine hundred seventy-nine thousand, eight hundred ninety-two".