20688619368 has 32 divisors (see below), whose sum is σ = 51824404800. Its totient is φ = 6882492288.

The previous prime is 20688619337. The next prime is 20688619373. The reversal of 20688619368 is 86391688602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 844813 + ... + 868956.

It is an arithmetic number, because the mean of its divisors is an integer number (1619512650).

Almost surely, 2^20688619368 is an apocalyptic number.

It is an amenable number.

20688619368 is an abundant number, since it is smaller than the sum of its proper divisors (31135785432).

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

20688619368 is a wasteful number, since it uses less digits than its factorization.

20688619368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714281 (or 1714277 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 57.

The spelling of 20688619368 in words is "twenty billion, six hundred eighty-eight million, six hundred nineteen thousand, three hundred sixty-eight".