20065509655 has 8 divisors (see below), whose sum is σ = 24855341184. Its totient is φ = 15534588000.

The previous prime is 20065509623. The next prime is 20065509661. The reversal of 20065509655 is 55690556002.

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

It is not a de Polignac number, because 20065509655 - 2⁵ = 20065509623 is a prime.

It is a Duffinian number.

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, 64727296 + ... + 64727605.

It is an arithmetic number, because the mean of its divisors is an integer number (3106917648).

Almost surely, 2^20065509655 is an apocalyptic number.

20065509655 is a deficient number, since it is larger than the sum of its proper divisors (4789831529).

20065509655 is a wasteful number, since it uses less digits than its factorization.

20065509655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129454937.

The product of its (nonzero) digits is 405000, while the sum is 43.

The spelling of 20065509655 in words is "twenty billion, sixty-five million, five hundred nine thousand, six hundred fifty-five".