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20104480 = 2551111423
BaseRepresentation
bin100110010110…
…0010100100000
31101211102011101
41030230110200
520121320410
61554524144
7332612434
oct114542440
941742141
1020104480
1110391880
126896654
13421bb56
1429549c4
151b71d3a
hex132c520

20104480 has 48 divisors (see below), whose sum is σ = 51819264. Its totient is φ = 7310080.

The previous prime is 20104433. The next prime is 20104493. The reversal of 20104480 is 8440102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3952 + ... + 7471.

It is an arithmetic number, because the mean of its divisors is an integer number (1079568).

Almost surely, 220104480 is an apocalyptic number.

20104480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20104480 is an abundant number, since it is smaller than the sum of its proper divisors (31714784).

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

20104480 is a wasteful number, since it uses less digits than its factorization.

20104480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11449 (or 11441 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 20104480 is about 4483.8019581601. The cubic root of 20104480 is about 271.9136115505.

Adding to 20104480 its reverse (8440102), we get a palindrome (28544582).

The spelling of 20104480 in words is "twenty million, one hundred four thousand, four hundred eighty".

Divisors: 1 2 4 5 8 10 11 16 20 22 32 40 44 55 80 88 110 160 176 220 352 440 880 1760 11423 22846 45692 57115 91384 114230 125653 182768 228460 251306 365536 456920 502612 628265 913840 1005224 1256530 1827680 2010448 2513060 4020896 5026120 10052240 20104480