20606671829 has 4 divisors (see below), whose sum is σ = 20606960940. Its totient is φ = 20606382720.

The previous prime is 20606671823. The next prime is 20606671867. The reversal of 20606671829 is 92817660602.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 16472439025 + 4134232804 = 128345^2 + 64298^2 .

It is a cyclic number.

It is not a de Polignac number, because 20606671829 - 2²⁴ = 20589894613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20606671823) 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, 46757 + ... + 208325.

It is an arithmetic number, because the mean of its divisors is an integer number (5151740235).

Almost surely, 2^20606671829 is an apocalyptic number.

It is an amenable number.

20606671829 is a deficient number, since it is larger than the sum of its proper divisors (289111).

20606671829 is a wasteful number, since it uses less digits than its factorization.

20606671829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289110.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 20606671829 in words is "twenty billion, six hundred six million, six hundred seventy-one thousand, eight hundred twenty-nine".