20068865187 has 16 divisors (see below), whose sum is σ = 30584262912. Its totient is φ = 11466747360.

The previous prime is 20068865171. The next prime is 20068865221. The reversal of 20068865187 is 78156886002.

It is not a de Polignac number, because 20068865187 - 2⁴ = 20068865171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20068865107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187237 + ... + 274217.

It is an arithmetic number, because the mean of its divisors is an integer number (1911516432).

Almost surely, 2^20068865187 is an apocalyptic number.

20068865187 is a deficient number, since it is larger than the sum of its proper divisors (10515397725).

20068865187 is a wasteful number, since it uses less digits than its factorization.

20068865187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97978.

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 20068865187 in words is "twenty billion, sixty-eight million, eight hundred sixty-five thousand, one hundred eighty-seven".