20534584481 has 4 divisors (see below), whose sum is σ = 21196990464. Its totient is φ = 19872178500.

The previous prime is 20534584423. The next prime is 20534584487. The reversal of 20534584481 is 18448543502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20534584481 - 2²⁶ = 20467475617 is a prime.

It is a super-2 number, since 2×20534584481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20534584487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331202945 + ... + 331203006.

It is an arithmetic number, because the mean of its divisors is an integer number (5299247616).

Almost surely, 2^20534584481 is an apocalyptic number.

It is an amenable number.

20534584481 is a deficient number, since it is larger than the sum of its proper divisors (662405983).

20534584481 is an equidigital number, since it uses as much as digits as its factorization.

20534584481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662405982.

The product of its (nonzero) digits is 614400, while the sum is 44.

The spelling of 20534584481 in words is "twenty billion, five hundred thirty-four million, five hundred eighty-four thousand, four hundred eighty-one".