20011453563 has 8 divisors (see below), whose sum is σ = 27302448448. Its totient is φ = 13030713864.

The previous prime is 20011453547. The next prime is 20011453603. The reversal of 20011453563 is 36535411002.

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

It is not a de Polignac number, because 20011453563 - 2⁴ = 20011453547 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 20011453563.

It is not an unprimeable number, because it can be changed into a prime (20011453513) 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 7 ways as a sum of consecutive naturals, for example, 77563645 + ... + 77563902.

It is an arithmetic number, because the mean of its divisors is an integer number (3412806056).

Almost surely, 2^20011453563 is an apocalyptic number.

20011453563 is a deficient number, since it is larger than the sum of its proper divisors (7290994885).

20011453563 is a wasteful number, since it uses less digits than its factorization.

20011453563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155127593.

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 20011453563 its reverse (36535411002), we get a palindrome (56546864565).

The spelling of 20011453563 in words is "twenty billion, eleven million, four hundred fifty-three thousand, five hundred sixty-three".