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20731300 = 2252379547
BaseRepresentation
bin100111100010…
…1010110100100
31110000020222221
41033011112210
520301400200
62020202124
7341133052
oct117052644
943006887
1020731300
111077a807
126b39344
1343ab255
142a791d2
151c4791a
hex13c55a4

20731300 has 36 divisors (see below), whose sum is σ = 45188080. Its totient is φ = 8255520.

The previous prime is 20731283. The next prime is 20731301. The reversal of 20731300 is 313702.

It is not an unprimeable number, because it can be changed into a prime (20731301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37627 + ... + 38173.

Almost surely, 220731300 is an apocalyptic number.

20731300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20731300 is an abundant number, since it is smaller than the sum of its proper divisors (24456780).

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

20731300 is a wasteful number, since it uses less digits than its factorization.

20731300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940 (or 933 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 20731300 is about 4553.1637352505. The cubic root of 20731300 is about 274.7106598660.

The spelling of 20731300 in words is "twenty million, seven hundred thirty-one thousand, three hundred".

Divisors: 1 2 4 5 10 20 25 50 100 379 547 758 1094 1516 1895 2188 2735 3790 5470 7580 9475 10940 13675 18950 27350 37900 54700 207313 414626 829252 1036565 2073130 4146260 5182825 10365650 20731300