20068916388 has 12 divisors (see below), whose sum is σ = 46827471600. Its totient is φ = 6689638792.

The previous prime is 20068916377. The next prime is 20068916389. The reversal of 20068916388 is 88361986002.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20068916388² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20068916388.

It is not an unprimeable number, because it can be changed into a prime (20068916389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836204838 + ... + 836204861.

It is an arithmetic number, because the mean of its divisors is an integer number (3902289300).

Almost surely, 2^20068916388 is an apocalyptic number.

It is an amenable number.

20068916388 is an abundant number, since it is smaller than the sum of its proper divisors (26758555212).

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

20068916388 is a wasteful number, since it uses less digits than its factorization.

20068916388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672409706 (or 1672409704 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 51.

The spelling of 20068916388 in words is "twenty billion, sixty-eight million, nine hundred sixteen thousand, three hundred eighty-eight".