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20672210 = 2513159017
BaseRepresentation
bin100111011011…
…0111011010010
31102220020221102
41032312323102
520243002320
62015024402
7340465556
oct116667322
942806842
1020672210
111073a379
126b0b102
13438a3a0
142a61866
151c35175
hex13b6ed2

20672210 has 16 divisors (see below), whose sum is σ = 40072536. Its totient is φ = 7632768.

The previous prime is 20672131. The next prime is 20672227. The reversal of 20672210 is 1227602.

Adding to 20672210 its reverse (1227602), we get a palindrome (21899812).

It can be written as a sum of positive squares in 4 ways, for example, as 14417209 + 6255001 = 3797^2 + 2501^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79379 + ... + 79638.

Almost surely, 220672210 is an apocalyptic number.

20672210 is a deficient number, since it is larger than the sum of its proper divisors (19400326).

20672210 is a wasteful number, since it uses less digits than its factorization.

20672210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159037.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 20672210 is about 4546.6702101648. The cubic root of 20672210 is about 274.4494107742.

The spelling of 20672210 in words is "twenty million, six hundred seventy-two thousand, two hundred ten".

Divisors: 1 2 5 10 13 26 65 130 159017 318034 795085 1590170 2067221 4134442 10336105 20672210