20661706055122 has 48 divisors (see below), whose sum is σ = 34711551869400. Its totient is φ = 9213794853120.

The previous prime is 20661706055087. The next prime is 20661706055209. The reversal of 20661706055122 is 22155060716602.

It can be written as a sum of positive squares in 4 ways, for example, as 15628588796601 + 5033117258521 = 3953301^2 + 2243461^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 196813798 + ... + 196918750.

Almost surely, 2^{20661706055122} is an apocalyptic number.

20661706055122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20661706055122 is a deficient number, since it is larger than the sum of its proper divisors (14049845814278).

20661706055122 is a wasteful number, since it uses less digits than its factorization.

20661706055122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120379 (or 120368 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 20661706055122 in words is "twenty trillion, six hundred sixty-one billion, seven hundred six million, fifty-five thousand, one hundred twenty-two".