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20950 = 252419
BaseRepresentation
bin101000111010110
31001201221
411013112
51132300
6240554
7115036
oct50726
931657
1020950
1114816
121015a
1396c7
1478c6
15631a
hex51d6

20950 has 12 divisors (see below), whose sum is σ = 39060. Its totient is φ = 8360.

The previous prime is 20947. The next prime is 20959. The reversal of 20950 is 5902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20959) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 160 + ... + 259.

It is an arithmetic number, because the mean of its divisors is an integer number (3255).

220950 is an apocalyptic number.

20950 is a deficient number, since it is larger than the sum of its proper divisors (18110).

20950 is a wasteful number, since it uses less digits than its factorization.

20950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 20950 is about 144.7411482613. The cubic root of 20950 is about 27.5673281392.

The spelling of 20950 in words is "twenty thousand, nine hundred fifty".

Divisors: 1 2 5 10 25 50 419 838 2095 4190 10475 20950