20662663163 has 8 divisors (see below), whose sum is σ = 21004201776. Its totient is φ = 20321215200.

The previous prime is 20662663159. The next prime is 20662663171. The reversal of 20662663163 is 36136626602.

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 20662663163 - 2² = 20662663159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20662663163.

It is not an unprimeable number, because it can be changed into a prime (20662660163) 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, 559220 + ... + 595022.

It is an arithmetic number, because the mean of its divisors is an integer number (2625525222).

Almost surely, 2^20662663163 is an apocalyptic number.

20662663163 is a deficient number, since it is larger than the sum of its proper divisors (341538613).

20662663163 is an equidigital number, since it uses as much as digits as its factorization.

20662663163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45325.

The product of its (nonzero) digits is 279936, while the sum is 41.

The spelling of 20662663163 in words is "twenty billion, six hundred sixty-two million, six hundred sixty-three thousand, one hundred sixty-three".