20663655441 has 16 divisors (see below), whose sum is σ = 32368244160. Its totient is φ = 11560086720.

The previous prime is 20663655433. The next prime is 20663655451. The reversal of 20663655441 is 14455636602.

It is not a de Polignac number, because 20663655441 - 2³ = 20663655433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20663655393 and 20663655402.

It is not an unprimeable number, because it can be changed into a prime (20663655451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24083086 + ... + 24083943.

It is an arithmetic number, because the mean of its divisors is an integer number (2023015260).

Almost surely, 2^20663655441 is an apocalyptic number.

It is an amenable number.

20663655441 is a deficient number, since it is larger than the sum of its proper divisors (11704588719).

20663655441 is a wasteful number, since it uses less digits than its factorization.

20663655441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48167056.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 20663655441 in words is "twenty billion, six hundred sixty-three million, six hundred fifty-five thousand, four hundred forty-one".