20826712529 has 16 divisors (see below), whose sum is σ = 26071113600. Its totient is φ = 16222020864.

The previous prime is 20826712499. The next prime is 20826712591. The reversal of 20826712529 is 92521762802.

It is not a de Polignac number, because 20826712529 - 2⁸ = 20826712273 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20826712529.

It is not an unprimeable number, because it can be changed into a prime (20826712229) 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 15 ways as a sum of consecutive naturals, for example, 3014039 + ... + 3020940.

It is an arithmetic number, because the mean of its divisors is an integer number (1629444600).

Almost surely, 2^20826712529 is an apocalyptic number.

20826712529 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20826712529 is a deficient number, since it is larger than the sum of its proper divisors (5244401071).

20826712529 is a wasteful number, since it uses less digits than its factorization.

20826712529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6035032.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 20826712529 in words is "twenty billion, eight hundred twenty-six million, seven hundred twelve thousand, five hundred twenty-nine".