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20627806 = 219542837
BaseRepresentation
bin100111010110…
…0000101011110
31102211000000211
41032230011132
520240042211
62014043034
7340222243
oct116540536
942730024
1020627806
1110709a81
126aa947a
134373104
142a4d5ca
151c26e21
hex13ac15e

20627806 has 8 divisors (see below), whose sum is σ = 32570280. Its totient is φ = 9771048.

The previous prime is 20627801. The next prime is 20627807. The reversal of 20627806 is 60872602.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20627801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271381 + ... + 271456.

It is an arithmetic number, because the mean of its divisors is an integer number (4071285).

Almost surely, 220627806 is an apocalyptic number.

20627806 is a deficient number, since it is larger than the sum of its proper divisors (11942474).

20627806 is a wasteful number, since it uses less digits than its factorization.

20627806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542858.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20627806 is about 4541.7844510721. The cubic root of 20627806 is about 274.2527637180.

The spelling of 20627806 in words is "twenty million, six hundred twenty-seven thousand, eight hundred six".

Divisors: 1 2 19 38 542837 1085674 10313903 20627806