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20673678 = 233445613
BaseRepresentation
bin100111011011…
…1010010001110
31102220022221210
41032313102032
520243024203
62015035250
7340503054
oct116672216
942808853
1020673678
1110740493
126b0bb26
13438ac5c
142a621d4
151c35803
hex13b748e

20673678 has 8 divisors (see below), whose sum is σ = 41347368. Its totient is φ = 6891224.

The previous prime is 20673677. The next prime is 20673701. The reversal of 20673678 is 87637602.

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

20673678 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20673671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1722801 + ... + 1722812.

It is an arithmetic number, because the mean of its divisors is an integer number (5168421).

Almost surely, 220673678 is an apocalyptic number.

20673678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20673678 is a wasteful number, since it uses less digits than its factorization.

20673678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3445618.

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 20673678 is about 4546.8316441232. The cubic root of 20673678 is about 274.4559071317.

The spelling of 20673678 in words is "twenty million, six hundred seventy-three thousand, six hundred seventy-eight".

Divisors: 1 2 3 6 3445613 6891226 10336839 20673678