20676729953 has 16 divisors (see below), whose sum is σ = 22806306432. Its totient is φ = 18589296000.

The previous prime is 20676729901. The next prime is 20676729971. The reversal of 20676729953 is 35992767602.

It is not a de Polignac number, because 20676729953 - 2¹⁴ = 20676713569 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20676729653) 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 15 ways as a sum of consecutive naturals, for example, 850223 + ... + 874203.

It is an arithmetic number, because the mean of its divisors is an integer number (1425394152).

Almost surely, 2^20676729953 is an apocalyptic number.

It is an amenable number.

20676729953 is a deficient number, since it is larger than the sum of its proper divisors (2129576479).

20676729953 is a wasteful number, since it uses less digits than its factorization.

20676729953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24856.

The product of its (nonzero) digits is 8573040, while the sum is 56.

The spelling of 20676729953 in words is "twenty billion, six hundred seventy-six million, seven hundred twenty-nine thousand, nine hundred fifty-three".