20550550520663 has 8 divisors (see below), whose sum is σ = 20719598437632. Its totient is φ = 20381778602496.

The previous prime is 20550550520657. The next prime is 20550550520671. The reversal of 20550550520663 is 36602505505502.

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

It is a cyclic number.

It is not a de Polignac number, because 20550550520663 - 2⁸ = 20550550520407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550550520653) 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, 68850170 + ... + 69148007.

It is an arithmetic number, because the mean of its divisors is an integer number (2589949804704).

Almost surely, 2^{20550550520663} is an apocalyptic number.

20550550520663 is a deficient number, since it is larger than the sum of its proper divisors (169047916969).

20550550520663 is a wasteful number, since it uses less digits than its factorization.

20550550520663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137999401.

The product of its (nonzero) digits is 1350000, while the sum is 44.

The spelling of 20550550520663 in words is "twenty trillion, five hundred fifty billion, five hundred fifty million, five hundred twenty thousand, six hundred sixty-three".