20681086331 has 4 divisors (see below), whose sum is σ = 20885849664. Its totient is φ = 20476323000.

The previous prime is 20681086301. The next prime is 20681086339. The reversal of 20681086331 is 13368018602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20681086331 - 2¹⁰ = 20681085307 is a prime.

It is a super-2 number, since 2×20681086331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20681086339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102381515 + ... + 102381716.

It is an arithmetic number, because the mean of its divisors is an integer number (5221462416).

Almost surely, 2^20681086331 is an apocalyptic number.

20681086331 is a deficient number, since it is larger than the sum of its proper divisors (204763333).

20681086331 is a wasteful number, since it uses less digits than its factorization.

20681086331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204763332.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 20681086331 in words is "twenty billion, six hundred eighty-one million, eighty-six thousand, three hundred thirty-one".