20601465563 has 8 divisors (see below), whose sum is σ = 23588056800. Its totient is φ = 17625755520.

The previous prime is 20601465553. The next prime is 20601465569. The reversal of 20601465563 is 36556410602.

It is a happy number.

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 20601465563 - 2²⁴ = 20584688347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20601465569) 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, 2716238 + ... + 2723811.

It is an arithmetic number, because the mean of its divisors is an integer number (2948507100).

Almost surely, 2^20601465563 is an apocalyptic number.

20601465563 is a deficient number, since it is larger than the sum of its proper divisors (2986591237).

20601465563 is an equidigital number, since it uses as much as digits as its factorization.

20601465563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5440597.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 20601465563 in words is "twenty billion, six hundred one million, four hundred sixty-five thousand, five hundred sixty-three".