20681814175 has 24 divisors (see below), whose sum is σ = 28019425392. Its totient is φ = 15018432000.

The previous prime is 20681814169. The next prime is 20681814193. The reversal of 20681814175 is 57141818602.

It is not a de Polignac number, because 20681814175 - 2⁵ = 20681814143 is a prime.

It is a Duffinian number.

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 23 ways as a sum of consecutive naturals, for example, 124887 + ... + 238663.

It is an arithmetic number, because the mean of its divisors is an integer number (1167476058).

Almost surely, 2^20681814175 is an apocalyptic number.

20681814175 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20681814175 is a deficient number, since it is larger than the sum of its proper divisors (7337611217).

20681814175 is a wasteful number, since it uses less digits than its factorization.

20681814175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114459 (or 114454 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 43.

The spelling of 20681814175 in words is "twenty billion, six hundred eighty-one million, eight hundred fourteen thousand, one hundred seventy-five".