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20807030 = 2510320201
BaseRepresentation
bin100111101011…
…1110101110110
31110011002212202
41033113311312
520311311110
62021544502
7341566616
oct117276566
943132782
1020807030
11108216a2
126b75132
13440686a
142a98a46
151c600a5
hex13d7d76

20807030 has 16 divisors (see below), whose sum is σ = 37818144. Its totient is φ = 8241600.

The previous prime is 20807011. The next prime is 20807069. The reversal of 20807030 is 3070802.

It is a junction number, because it is equal to n+sod(n) for n = 20806993 and 20807011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9071 + ... + 11130.

It is an arithmetic number, because the mean of its divisors is an integer number (2363634).

Almost surely, 220807030 is an apocalyptic number.

20807030 is a deficient number, since it is larger than the sum of its proper divisors (17011114).

20807030 is a wasteful number, since it uses less digits than its factorization.

20807030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20311.

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

The square root of 20807030 is about 4561.4723500203. The cubic root of 20807030 is about 275.0447530471.

Adding to 20807030 its reverse (3070802), we get a palindrome (23877832).

The spelling of 20807030 in words is "twenty million, eight hundred seven thousand, thirty".

Divisors: 1 2 5 10 103 206 515 1030 20201 40402 101005 202010 2080703 4161406 10403515 20807030