20134547 has 4 divisors (see below), whose sum is σ = 21194280. Its totient is φ = 19074816.

The previous prime is 20134529. The next prime is 20134553. The reversal of 20134547 is 74543102.

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 20134547 - 2⁶ = 20134483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20134747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529838 + ... + 529875.

It is an arithmetic number, because the mean of its divisors is an integer number (5298570).

Almost surely, 2^20134547 is an apocalyptic number.

20134547 is a deficient number, since it is larger than the sum of its proper divisors (1059733).

20134547 is a wasteful number, since it uses less digits than its factorization.

20134547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059732.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 20134547 is about 4487.1535520862. The cubic root of 20134547 is about 272.0490963495.

Adding to 20134547 its reverse (74543102), we get a palindrome (94677649).

The spelling of 20134547 in words is "twenty million, one hundred thirty-four thousand, five hundred forty-seven".