20466728829 has 24 divisors (see below), whose sum is σ = 30523833600. Its totient is φ = 13201254720.

The previous prime is 20466728813. The next prime is 20466728837. The reversal of 20466728829 is 92882766402.

It is not a de Polignac number, because 20466728829 - 2⁴ = 20466728813 is a prime.

It is a super-2 number, since 2×20466728829² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20466728839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2277457 + ... + 2286425.

It is an arithmetic number, because the mean of its divisors is an integer number (1271826400).

Almost surely, 2^20466728829 is an apocalyptic number.

It is an amenable number.

20466728829 is a deficient number, since it is larger than the sum of its proper divisors (10057104771).

20466728829 is a wasteful number, since it uses less digits than its factorization.

20466728829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17185 (or 17182 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 20466728829 in words is "twenty billion, four hundred sixty-six million, seven hundred twenty-eight thousand, eight hundred twenty-nine".