20728769255 has 8 divisors (see below), whose sum is σ = 25102730400. Its totient is φ = 16430877216.

The previous prime is 20728769227. The next prime is 20728769267. The reversal of 20728769255 is 55296782702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20728769255 - 2³² = 16433801959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20728769197 and 20728769206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19016675 + ... + 19017764.

It is an arithmetic number, because the mean of its divisors is an integer number (3137841300).

Almost surely, 2^20728769255 is an apocalyptic number.

20728769255 is a deficient number, since it is larger than the sum of its proper divisors (4373961145).

20728769255 is a wasteful number, since it uses less digits than its factorization.

20728769255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38034553.

The product of its (nonzero) digits is 4233600, while the sum is 53.

The spelling of 20728769255 in words is "twenty billion, seven hundred twenty-eight million, seven hundred sixty-nine thousand, two hundred fifty-five".