20655220128755 has 4 divisors (see below), whose sum is σ = 24786264154512. Its totient is φ = 16524176103000.

The previous prime is 20655220128727. The next prime is 20655220128761. The reversal of 20655220128755 is 55782102255602.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20655220128755 - 2⁶ = 20655220128691 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2065522012871 + ... + 2065522012880.

It is an arithmetic number, because the mean of its divisors is an integer number (6196566038628).

Almost surely, 2^{20655220128755} is an apocalyptic number.

20655220128755 is a deficient number, since it is larger than the sum of its proper divisors (4131044025757).

20655220128755 is an equidigital number, since it uses as much as digits as its factorization.

20655220128755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4131044025756.

The product of its (nonzero) digits is 3360000, while the sum is 50.

The spelling of 20655220128755 in words is "twenty trillion, six hundred fifty-five billion, two hundred twenty million, one hundred twenty-eight thousand, seven hundred fifty-five".