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20903708 = 227746561
BaseRepresentation
bin100111110111…
…1011100011100
31110100000111102
41033233130130
520322404313
62024012232
7342451520
oct117573434
943300442
1020903708
11108882a1
127001078
13443b877
142ac1d80
151c7da58
hex13ef71c

20903708 has 12 divisors (see below), whose sum is σ = 41807472. Its totient is φ = 8958720.

The previous prime is 20903689. The next prime is 20903723. The reversal of 20903708 is 80730902.

It is a fibodiv number, since the Fibonacci-like sequence with seeds 2090 and 3708 contains 20903708 itself.

It is a congruent 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, 373253 + ... + 373308.

It is an arithmetic number, because the mean of its divisors is an integer number (3483956).

Almost surely, 220903708 is an apocalyptic number.

20903708 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20903708 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.

20903708 is a wasteful number, since it uses less digits than its factorization.

20903708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746572 (or 746570 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20903708 is about 4572.0573049777. The cubic root of 20903708 is about 275.4700852342.

The spelling of 20903708 in words is "twenty million, nine hundred three thousand, seven hundred eight".