20547443463 has 4 divisors (see below), whose sum is σ = 27396591288. Its totient is φ = 13698295640.

The previous prime is 20547443407. The next prime is 20547443531. The reversal of 20547443463 is 36434474502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20547443463 - 2¹⁰ = 20547442439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20547443263) 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, 3424573908 + ... + 3424573913.

It is an arithmetic number, because the mean of its divisors is an integer number (6849147822).

Almost surely, 2^20547443463 is an apocalyptic number.

20547443463 is a deficient number, since it is larger than the sum of its proper divisors (6849147825).

20547443463 is an equidigital number, since it uses as much as digits as its factorization.

20547443463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6849147824.

The product of its (nonzero) digits is 967680, while the sum is 42.

The spelling of 20547443463 in words is "twenty billion, five hundred forty-seven million, four hundred forty-three thousand, four hundred sixty-three".