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20612 = 225153
BaseRepresentation
bin101000010000100
31001021102
411002010
51124422
6235232
7114044
oct50204
931242
1020612
1114539
12bb18
1394c7
147724
156192
hex5084

20612 has 6 divisors (see below), whose sum is σ = 36078. Its totient is φ = 10304.

The previous prime is 20611. The next prime is 20627. The reversal of 20612 is 21602.

It can be written as a sum of positive squares in only one way, i.e., 18496 + 2116 = 136^2 + 46^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20593 and 20602.

It is not an unprimeable number, because it can be changed into a prime (20611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2573 + ... + 2580.

It is an arithmetic number, because the mean of its divisors is an integer number (6013).

220612 is an apocalyptic number.

It is an amenable number.

20612 is a deficient number, since it is larger than the sum of its proper divisors (15466).

20612 is a wasteful number, since it uses less digits than its factorization.

20612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5157 (or 5155 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20612 is about 143.5687988387. The cubic root of 20612 is about 27.4182697342.

Subtracting 20612 from its reverse (21602), we obtain a triangular number (990 = T44).

The spelling of 20612 in words is "twenty thousand, six hundred twelve".

Divisors: 1 2 4 5153 10306 20612