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20213361 = 337106949
BaseRepresentation
bin100110100011…
…0111001110001
31102000221112000
41031012321301
520133311421
62001124213
7333545040
oct115067161
942027460
1020213361
1110456663
126929669
13425958c
142982557
151b94226
hex1346e71

20213361 has 16 divisors (see below), whose sum is σ = 34224000. Its totient is φ = 11550384.

The previous prime is 20213353. The next prime is 20213399. The reversal of 20213361 is 16331202.

20213361 = 4592 + 4602 + ... + 5392.

It is not a de Polignac number, because 20213361 - 23 = 20213353 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20213351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53286 + ... + 53663.

It is an arithmetic number, because the mean of its divisors is an integer number (2139000).

Almost surely, 220213361 is an apocalyptic number.

20213361 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20213361 is a deficient number, since it is larger than the sum of its proper divisors (14010639).

20213361 is a wasteful number, since it uses less digits than its factorization.

20213361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106965 (or 106959 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 20213361 is about 4495.9271568832. The cubic root of 20213361 is about 272.4036008373.

Adding to 20213361 its reverse (16331202), we get a palindrome (36544563).

The spelling of 20213361 in words is "twenty million, two hundred thirteen thousand, three hundred sixty-one".

Divisors: 1 3 7 9 21 27 63 189 106949 320847 748643 962541 2245929 2887623 6737787 20213361