20682278655 has 8 divisors (see below), whose sum is σ = 33091645872. Its totient is φ = 11030548608.

The previous prime is 20682278581. The next prime is 20682278657. The reversal of 20682278655 is 55687228602.

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

It is not a de Polignac number, because 20682278655 - 2⁹ = 20682278143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20682278598 and 20682278607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20682278657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689409274 + ... + 689409303.

It is an arithmetic number, because the mean of its divisors is an integer number (4136455734).

Almost surely, 2^20682278655 is an apocalyptic number.

20682278655 is a deficient number, since it is larger than the sum of its proper divisors (12409367217).

20682278655 is a wasteful number, since it uses less digits than its factorization.

20682278655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378818585.

The product of its (nonzero) digits is 3225600, while the sum is 51.

The spelling of 20682278655 in words is "twenty billion, six hundred eighty-two million, two hundred seventy-eight thousand, six hundred fifty-five".