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20520411 = 317402361
BaseRepresentation
bin100111001000…
…1110111011011
31102121112201020
41032101313123
520223123121
62011453523
7336264162
oct116216733
942545636
1020520411
111064631a
126a572a3
134336272
142a223d9
151c051c6
hex1391ddb

20520411 has 8 divisors (see below), whose sum is σ = 28970064. Its totient is φ = 12875520.

The previous prime is 20520403. The next prime is 20520413. The reversal of 20520411 is 11402502.

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

It is not a de Polignac number, because 20520411 - 23 = 20520403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20520413) 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, 201130 + ... + 201231.

It is an arithmetic number, because the mean of its divisors is an integer number (3621258).

Almost surely, 220520411 is an apocalyptic number.

20520411 is a deficient number, since it is larger than the sum of its proper divisors (8449653).

20520411 is a wasteful number, since it uses less digits than its factorization.

20520411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402381.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 20520411 is about 4529.9460261685. The cubic root of 20520411 is about 273.7759859404.

Adding to 20520411 its reverse (11402502), we get a palindrome (31922913).

The spelling of 20520411 in words is "twenty million, five hundred twenty thousand, four hundred eleven".

Divisors: 1 3 17 51 402361 1207083 6840137 20520411