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20688064 = 26323251
BaseRepresentation
bin100111011101…
…0110011000000
31102221001200121
41032322303000
520244004224
62015230024
7340563025
oct116726300
942831617
1020688064
1110750281
126b18314
134394677
142a6754c
151c39be4
hex13bacc0

20688064 has 14 divisors (see below), whose sum is σ = 41053004. Its totient is φ = 10344000.

The previous prime is 20688043. The next prime is 20688071. The reversal of 20688064 is 46088602.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161562 + ... + 161689.

Almost surely, 220688064 is an apocalyptic number.

It is an amenable number.

20688064 is a deficient number, since it is larger than the sum of its proper divisors (20364940).

20688064 is an equidigital number, since it uses as much as digits as its factorization.

20688064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323263 (or 323253 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 20688064 is about 4548.4133497298. The cubic root of 20688064 is about 274.5195533974.

The spelling of 20688064 in words is "twenty million, six hundred eighty-eight thousand, sixty-four".

Divisors: 1 2 4 8 16 32 64 323251 646502 1293004 2586008 5172016 10344032 20688064