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20354 = 210177
BaseRepresentation
bin100111110000010
31000220212
410332002
51122404
6234122
7113225
oct47602
930825
1020354
1114324
12b942
139359
1475bc
15606e
hex4f82

20354 has 4 divisors (see below), whose sum is σ = 30534. Its totient is φ = 10176.

The previous prime is 20353. The next prime is 20357. The reversal of 20354 is 45302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45302 = 222651.

It can be written as a sum of positive squares in only one way, i.e., 16129 + 4225 = 127^2 + 65^2 .

It is a Curzon number.

It is a nialpdrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 20354.

It is not an unprimeable number, because it can be changed into a prime (20353) 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, 5087 + ... + 5090.

220354 is an apocalyptic number.

20354 is a deficient number, since it is larger than the sum of its proper divisors (10180).

20354 is a wasteful number, since it uses less digits than its factorization.

20354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10179.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 20354 is about 142.6674454807. The cubic root of 20354 is about 27.3033910997.

Adding to 20354 its reverse (45302), we get a palindrome (65656).

The spelling of 20354 in words is "twenty thousand, three hundred fifty-four".

Divisors: 1 2 10177 20354