20310810687 has 6 divisors (see below), whose sum is σ = 29337837672. Its totient is φ = 13540540452.

The previous prime is 20310810683. The next prime is 20310810691. The reversal of 20310810687 is 78601801302.

It is an interprime number because it is at equal distance from previous prime (20310810683) and next prime (20310810691).

It is not a de Polignac number, because 20310810687 - 2² = 20310810683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310810683) 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 5 ways as a sum of consecutive naturals, for example, 1128378363 + ... + 1128378380.

It is an arithmetic number, because the mean of its divisors is an integer number (4889639612).

Almost surely, 2^20310810687 is an apocalyptic number.

20310810687 is a deficient number, since it is larger than the sum of its proper divisors (9027026985).

20310810687 is a wasteful number, since it uses less digits than its factorization.

20310810687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256756749 (or 2256756746 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 20310810687 in words is "twenty billion, three hundred ten million, eight hundred ten thousand, six hundred eighty-seven".