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20672204 = 22717137317
BaseRepresentation
bin100111011011…
…0111011001100
31102220020221012
41032312323030
520243002304
62015024352
7340465550
oct116667314
942806835
1020672204
111073a373
126b0b0b8
13438a397
142a61860
151c3516e
hex13b6ecc

20672204 has 48 divisors (see below), whose sum is σ = 44235072. Its totient is φ = 8251392.

The previous prime is 20672131. The next prime is 20672227. The reversal of 20672204 is 40227602.

It is a self number, because there is not a number n which added to its sum of digits gives 20672204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65054 + ... + 65370.

It is an arithmetic number, because the mean of its divisors is an integer number (921564).

Almost surely, 220672204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20672204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22117536).

20672204 is an abundant number, since it is smaller than the sum of its proper divisors (23562868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20672204 is a wasteful number, since it uses less digits than its factorization.

20672204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 20672204 is about 4546.6695503412. The cubic root of 20672204 is about 274.4493842217.

Adding to 20672204 its reverse (40227602), we get a palindrome (60899806).

The spelling of 20672204 in words is "twenty million, six hundred seventy-two thousand, two hundred four".

Divisors: 1 2 4 7 14 17 28 34 68 119 137 238 274 317 476 548 634 959 1268 1918 2219 2329 3836 4438 4658 5389 8876 9316 10778 16303 21556 32606 37723 43429 65212 75446 86858 150892 173716 304003 608006 738293 1216012 1476586 2953172 5168051 10336102 20672204