20681953029 has 12 divisors (see below), whose sum is σ = 30138304716. Its totient is φ = 13665950592.

The previous prime is 20681952989. The next prime is 20681953081. The reversal of 20681953029 is 92035918602.

20681953029 is a `hidden beast` number, since 20 + 68 + 19 + 530 + 29 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 575280225 + 20106672804 = 23985^2 + 141798^2 .

It is not a de Polignac number, because 20681953029 - 2²⁴ = 20665175813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20681953099) 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 11 ways as a sum of consecutive naturals, for example, 10167102 + ... + 10169135.

It is an arithmetic number, because the mean of its divisors is an integer number (2511525393).

Almost surely, 2^20681953029 is an apocalyptic number.

It is an amenable number.

20681953029 is a deficient number, since it is larger than the sum of its proper divisors (9456351687).

20681953029 is a wasteful number, since it uses less digits than its factorization.

20681953029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20336356 (or 20336353 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

It can be divided in two parts, 20681 and 953029, that added together give a triangular number (973710 = T₁₃₉₅).

The spelling of 20681953029 in words is "twenty billion, six hundred eighty-one million, nine hundred fifty-three thousand, twenty-nine".