20309830686 has 12 divisors (see below), whose sum is σ = 44004633192. Its totient is φ = 6769943556.

The previous prime is 20309830661. The next prime is 20309830711. The reversal of 20309830686 is 68603890302.

It is an interprime number because it is at equal distance from previous prime (20309830661) and next prime (20309830711).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 564161946 + ... + 564161981.

It is an arithmetic number, because the mean of its divisors is an integer number (3667052766).

Almost surely, 2^20309830686 is an apocalyptic number.

20309830686 is an abundant number, since it is smaller than the sum of its proper divisors (23694802506).

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

20309830686 is a wasteful number, since it uses less digits than its factorization.

20309830686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128323935 (or 1128323932 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 20309830686 in words is "twenty billion, three hundred nine million, eight hundred thirty thousand, six hundred eighty-six".