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20831427 = 322314603
BaseRepresentation
bin100111101110…
…1110011000011
31110012100100100
41033131303003
520313101202
62022253443
7342031011
oct117356303
943170310
1020831427
1110838a61
126b87283
1344149b6
142aa38b1
151c6741c
hex13ddcc3

20831427 has 6 divisors (see below), whose sum is σ = 30089852. Its totient is φ = 13887612.

The previous prime is 20831323. The next prime is 20831533. The reversal of 20831427 is 72413802.

20831427 is a `hidden beast` number, since 208 + 31 + 427 = 666.

It is not a de Polignac number, because 20831427 - 27 = 20831299 is a prime.

It is a lonely number, since its distance to closest prime (20831323) sets a new record.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20831427.

It is not an unprimeable number, because it can be changed into a prime (20831827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1157293 + ... + 1157310.

Almost surely, 220831427 is an apocalyptic number.

20831427 is a deficient number, since it is larger than the sum of its proper divisors (9258425).

20831427 is a wasteful number, since it uses less digits than its factorization.

20831427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314609 (or 2314606 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20831427 is about 4564.1458127453. The cubic root of 20831427 is about 275.1522110532.

The spelling of 20831427 in words is "twenty million, eight hundred thirty-one thousand, four hundred twenty-seven".

Divisors: 1 3 9 2314603 6943809 20831427