20134565 has 16 divisors (see below), whose sum is σ = 26922240. Its totient is φ = 14329920.

The previous prime is 20134553. The next prime is 20134573. The reversal of 20134565 is 56543102.

It is not a de Polignac number, because 20134565 - 2¹² = 20130469 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1310 + ... + 6479.

It is an arithmetic number, because the mean of its divisors is an integer number (1682640).

Almost surely, 2^20134565 is an apocalyptic number.

It is an amenable number.

20134565 is a deficient number, since it is larger than the sum of its proper divisors (6787675).

20134565 is a wasteful number, since it uses less digits than its factorization.

20134565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7852.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 20134565 is about 4487.1555578117. The cubic root of 20134565 is about 272.0491774188.

Adding to 20134565 its reverse (56543102), we get a palindrome (76677667).

The spelling of 20134565 in words is "twenty million, one hundred thirty-four thousand, five hundred sixty-five".