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20130545 = 54026109
BaseRepresentation
bin100110011001…
…0101011110001
31101212201220202
41030302223301
520123134140
61555244545
7333051431
oct114625361
941781822
1020130545
11103aa416
1268a9755
13422a986
1429602c1
151b79915
hex1332af1

20130545 has 4 divisors (see below), whose sum is σ = 24156660. Its totient is φ = 16104432.

The previous prime is 20130541. The next prime is 20130547. The reversal of 20130545 is 54503102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15460624 + 4669921 = 3932^2 + 2161^2 .

It is a cyclic number.

It is not a de Polignac number, because 20130545 - 22 = 20130541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20130541) 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, 2013050 + ... + 2013059.

It is an arithmetic number, because the mean of its divisors is an integer number (6039165).

Almost surely, 220130545 is an apocalyptic number.

It is an amenable number.

20130545 is a deficient number, since it is larger than the sum of its proper divisors (4026115).

20130545 is an equidigital number, since it uses as much as digits as its factorization.

20130545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4026114.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20130545 is about 4486.7075902046. The cubic root of 20130545 is about 272.0310707370.

Adding to 20130545 its reverse (54503102), we get a palindrome (74633647).

The spelling of 20130545 in words is "twenty million, one hundred thirty thousand, five hundred forty-five".

Divisors: 1 5 4026109 20130545