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20680604 = 2271494957
BaseRepresentation
bin100111011100…
…0111110011100
31102220200110022
41032320332130
520243234404
62015131312
7340532210
oct116707634
942820408
1020680604
111074570a
126b13b38
134391159
142a64940
151c378be
hex13b8f9c

20680604 has 24 divisors (see below), whose sum is σ = 41647200. Its totient is φ = 8801856.

The previous prime is 20680603. The next prime is 20680613. The reversal of 20680604 is 40608602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20680603) 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, 1694 + ... + 6650.

It is an arithmetic number, because the mean of its divisors is an integer number (1735300).

Almost surely, 220680604 is an apocalyptic number.

It is an amenable number.

20680604 is an abundant number, since it is smaller than the sum of its proper divisors (20966596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20680604 is a wasteful number, since it uses less digits than its factorization.

20680604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5117 (or 5115 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20680604 is about 4547.5932096000. The cubic root of 20680604 is about 274.4865526927.

The spelling of 20680604 in words is "twenty million, six hundred eighty thousand, six hundred four".

Divisors: 1 2 4 7 14 28 149 298 596 1043 2086 4172 4957 9914 19828 34699 69398 138796 738593 1477186 2954372 5170151 10340302 20680604