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20044 = 225011
BaseRepresentation
bin100111001001100
31000111101
410321030
51120134
6232444
7112303
oct47114
930441
1020044
1114072
12b724
13917b
14743a
155e14
hex4e4c

20044 has 6 divisors (see below), whose sum is σ = 35084. Its totient is φ = 10020.

The previous prime is 20029. The next prime is 20047. The reversal of 20044 is 44002.

It is a self number, because there is not a number n which added to its sum of digits gives 20044.

It is not an unprimeable number, because it can be changed into a prime (20047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2502 + ... + 2509.

220044 is an apocalyptic number.

It is an amenable number.

20044 is a deficient number, since it is larger than the sum of its proper divisors (15040).

20044 is a wasteful number, since it uses less digits than its factorization.

20044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5015 (or 5013 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 20044 is about 141.5768342632. The cubic root of 20044 is about 27.1640673154.

Adding to 20044 its reverse (44002), we get a palindrome (64046).

The spelling of 20044 in words is "twenty thousand, forty-four", and thus it is an iban number.

Divisors: 1 2 4 5011 10022 20044