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20544513 = 311622561
BaseRepresentation
bin100111001011…
…1110000000001
31102122202202220
41032113300001
520224411023
62012201253
7336424353
oct116276001
942582686
1020544513
1110662440
126a69229
134344222
142a2b0d3
151c0c3e3
hex1397c01

20544513 has 8 divisors (see below), whose sum is σ = 29882976. Its totient is φ = 12451200.

The previous prime is 20544487. The next prime is 20544521. The reversal of 20544513 is 31544502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20544513 - 25 = 20544481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20544523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311248 + ... + 311313.

It is an arithmetic number, because the mean of its divisors is an integer number (3735372).

Almost surely, 220544513 is an apocalyptic number.

It is an amenable number.

20544513 is a deficient number, since it is larger than the sum of its proper divisors (9338463).

20544513 is a wasteful number, since it uses less digits than its factorization.

20544513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622575.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 20544513 is about 4532.6055420696. The cubic root of 20544513 is about 273.8831307581.

The spelling of 20544513 in words is "twenty million, five hundred forty-four thousand, five hundred thirteen".

Divisors: 1 3 11 33 622561 1867683 6848171 20544513