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18420050 = 25211107313
BaseRepresentation
bin100011001000…
…1000101010010
31021122211120002
41012101011102
514203420200
61454450002
7312365525
oct106210522
937584502
1018420050
11a441290
126203902
133a7c24c
142636bbc
15193cbd5
hex1191152

18420050 has 48 divisors (see below), whose sum is σ = 37845792. Its totient is φ = 6614400.

The previous prime is 18420047. The next prime is 18420053. The reversal of 18420050 is 5002481.

It is an interprime number because it is at equal distance from previous prime (18420047) and next prime (18420053).

It is not an unprimeable number, because it can be changed into a prime (18420053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58694 + ... + 59006.

It is an arithmetic number, because the mean of its divisors is an integer number (788454).

Almost surely, 218420050 is an apocalyptic number.

18420050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18420050 is an abundant number, since it is smaller than the sum of its proper divisors (19425742).

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

18420050 is a wasteful number, since it uses less digits than its factorization.

18420050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 18420050 is about 4291.8585717612. The cubic root of 18420050 is about 264.0970812991.

Subtracting from 18420050 its reverse (5002481), we obtain a square (13417569 = 36632).

The spelling of 18420050 in words is "eighteen million, four hundred twenty thousand, fifty".

Divisors: 1 2 5 10 11 22 25 50 55 107 110 214 275 313 535 550 626 1070 1177 1565 2354 2675 3130 3443 5350 5885 6886 7825 11770 15650 17215 29425 33491 34430 58850 66982 86075 167455 172150 334910 368401 736802 837275 1674550 1842005 3684010 9210025 18420050