20729145268 has 48 divisors (see below), whose sum is σ = 40006391040. Its totient is φ = 9338223744.

The previous prime is 20729145263. The next prime is 20729145289. The reversal of 20729145268 is 86254192702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20729145263) 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, 900243 + ... + 922981.

It is an arithmetic number, because the mean of its divisors is an integer number (833466480).

Almost surely, 2^20729145268 is an apocalyptic number.

It is an amenable number.

20729145268 is a deficient number, since it is larger than the sum of its proper divisors (19277245772).

20729145268 is a wasteful number, since it uses less digits than its factorization.

20729145268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23176 (or 23174 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 20729145268 in words is "twenty billion, seven hundred twenty-nine million, one hundred forty-five thousand, two hundred sixty-eight".