20134645 has 8 divisors (see below), whose sum is σ = 24186456. Its totient is φ = 16091136.

The previous prime is 20134643. The next prime is 20134663. The reversal of 20134645 is 54643102.

It can be written as a sum of positive squares in 4 ways, for example, as 412164 + 19722481 = 642^2 + 4441^2 .

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 20134645 - 2¹ = 20134643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20134643) 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, 6469 + ... + 9061.

It is an arithmetic number, because the mean of its divisors is an integer number (3023307).

Almost surely, 2^20134645 is an apocalyptic number.

It is an amenable number.

20134645 is a deficient number, since it is larger than the sum of its proper divisors (4051811).

20134645 is a wasteful number, since it uses less digits than its factorization.

20134645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4151.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20134645 is about 4487.1644721361. The cubic root of 20134645 is about 272.0495377263.

Adding to 20134645 its reverse (54643102), we get a palindrome (74777747).

The spelling of 20134645 in words is "twenty million, one hundred thirty-four thousand, six hundred forty-five".