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20831422 = 223452857
BaseRepresentation
bin100111101110…
…1110010111110
31110012100100011
41033131302332
520313101142
62022253434
7342031003
oct117356276
943170304
1020831422
1110838a57
126b8727a
1344149b1
142aa38aa
151c67417
hex13ddcbe

20831422 has 8 divisors (see below), whose sum is σ = 32605776. Its totient is φ = 9962832.

The previous prime is 20831323. The next prime is 20831533. The reversal of 20831422 is 22413802.

It is a sphenic number, since it is the product of 3 distinct primes.

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

It is a junction number, because it is equal to n+sod(n) for n = 20831393 and 20831402.

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 3 ways as a sum of consecutive naturals, for example, 226383 + ... + 226474.

It is an arithmetic number, because the mean of its divisors is an integer number (4075722).

Almost surely, 220831422 is an apocalyptic number.

20831422 is a deficient number, since it is larger than the sum of its proper divisors (11774354).

20831422 is a wasteful number, since it uses less digits than its factorization.

20831422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452882.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 20831422 is about 4564.1452649976. The cubic root of 20831422 is about 275.1521890391.

The spelling of 20831422 in words is "twenty million, eight hundred thirty-one thousand, four hundred twenty-two".

Divisors: 1 2 23 46 452857 905714 10415711 20831422