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20021103212 = 22116718473677
BaseRepresentation
bin10010101001010110…
…011100101001101100
31220200022020102102012
4102221112130221230
5312000400300322
613110401420352
71306066366205
oct225126345154
956608212365
1020021103212
1185444331a0
123a6903a6b8
131b70b86246
14d7d01a5ac
157c2a38ae2
hex4a959ca6c

20021103212 has 48 divisors (see below), whose sum is σ = 38824144128. Its totient is φ = 8957382720.

The previous prime is 20021103173. The next prime is 20021103239. The reversal of 20021103212 is 21230112002.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5443118 + ... + 5446794.

It is an arithmetic number, because the mean of its divisors is an integer number (808836336).

Almost surely, 220021103212 is an apocalyptic number.

20021103212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20021103212 is a deficient number, since it is larger than the sum of its proper divisors (18803040916).

20021103212 is a wasteful number, since it uses less digits than its factorization.

20021103212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5606 (or 5604 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20021103212 its reverse (21230112002), we get a palindrome (41251215214).

The spelling of 20021103212 in words is "twenty billion, twenty-one million, one hundred three thousand, two hundred twelve".

Divisors: 1 2 4 11 22 44 67 134 268 737 1474 1847 2948 3677 3694 7354 7388 14708 20317 40447 40634 80894 81268 123749 161788 246359 247498 492718 494996 985436 1361239 2709949 2722478 5419898 5444956 6791419 10839796 13582838 27165676 74705609 149411218 298822436 455025073 910050146 1820100292 5005275803 10010551606 20021103212