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21433440215 = 5112316943431
BaseRepresentation
bin10011111101100010…
…000101011111010111
32001022201210120120002
4103331202011133113
5322343430041330
613502453001515
71356066143615
oct237542053727
961281716502
1021433440215
1190a9688960
1241a202329b
132037664205
1410748206b5
15856a18e45
hex4fd8857d7

21433440215 has 16 divisors (see below), whose sum is σ = 29278250496. Its totient is φ = 14910218400.

The previous prime is 21433440191. The next prime is 21433440227. The reversal of 21433440215 is 51204433412.

It is not a de Polignac number, because 21433440215 - 210 = 21433439191 is a prime.

It is a congruent number.

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, 8470451 + ... + 8472980.

It is an arithmetic number, because the mean of its divisors is an integer number (1829890656).

Almost surely, 221433440215 is an apocalyptic number.

21433440215 is a deficient number, since it is larger than the sum of its proper divisors (7844810281).

21433440215 is a wasteful number, since it uses less digits than its factorization.

21433440215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16943470.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 21433440215 its reverse (51204433412), we get a palindrome (72637873627).

The spelling of 21433440215 in words is "twenty-one billion, four hundred thirty-three million, four hundred forty thousand, two hundred fifteen".