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20739818 = 211942719
BaseRepresentation
bin100111100011…
…1011011101010
31110000200200102
41033013123222
520302133233
62020305402
7341166641
oct117073352
943020612
1020739818
1110786150
126b42262
1343b20a8
142a7c358
151c4a1e8
hex13c76ea

20739818 has 8 divisors (see below), whose sum is σ = 33937920. Its totient is φ = 9427180.

The previous prime is 20739799. The next prime is 20739839. The reversal of 20739818 is 81893702.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471338 + ... + 471381.

It is an arithmetic number, because the mean of its divisors is an integer number (4242240).

Almost surely, 220739818 is an apocalyptic number.

20739818 is a deficient number, since it is larger than the sum of its proper divisors (13198102).

20739818 is a wasteful number, since it uses less digits than its factorization.

20739818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942732.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 20739818 is about 4554.0990327396. The cubic root of 20739818 is about 274.7482787482.

The spelling of 20739818 in words is "twenty million, seven hundred thirty-nine thousand, eight hundred eighteen".

Divisors: 1 2 11 22 942719 1885438 10369909 20739818