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20260549 = 17832173
BaseRepresentation
bin100110101001…
…0011011000101
31102010100020201
41031102123011
520141314144
62002130501
7334132441
oct115223305
942110221
1020260549
1110489061
126950a31
134274bba
142995821
151ba31d4
hex13526c5

20260549 has 12 divisors (see below), whose sum is σ = 21839436. Its totient is φ = 18730112.

The previous prime is 20260547. The next prime is 20260553. The reversal of 20260549 is 94506202.

It can be written as a sum of positive squares in 2 ways, for example, as 17222500 + 3038049 = 4150^2 + 1743^2 .

It is not a de Polignac number, because 20260549 - 21 = 20260547 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 (20260543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117027 + ... + 117199.

It is an arithmetic number, because the mean of its divisors is an integer number (1819953).

Almost surely, 220260549 is an apocalyptic number.

It is an amenable number.

20260549 is a deficient number, since it is larger than the sum of its proper divisors (1578887).

20260549 is an equidigital number, since it uses as much as digits as its factorization.

20260549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 20260549 is about 4501.1719585015. The cubic root of 20260549 is about 272.6154110915.

The spelling of 20260549 in words is "twenty million, two hundred sixty thousand, five hundred forty-nine".

Divisors: 1 17 83 173 1411 2941 6889 14359 117113 244103 1191797 20260549