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21289820572 = 223761267577
BaseRepresentation
bin10011110100111110…
…001110000110011100
32000221201112221110001
4103310332032012130
5322100143224242
613440322424044
71352403326506
oct236476160634
960851487401
1021289820572
119035604339
124161b02024
13201398a487
14105d716d76
158490e9eb7
hex4f4f8e19c

21289820572 has 72 divisors (see below), whose sum is σ = 39550750512. Its totient is φ = 10017976320.

The previous prime is 21289820569. The next prime is 21289820599. The reversal of 21289820572 is 27502898212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36897148 + ... + 36897724.

Almost surely, 221289820572 is an apocalyptic number.

It is an amenable number.

21289820572 is a deficient number, since it is larger than the sum of its proper divisors (18260929940).

21289820572 is a wasteful number, since it uses less digits than its factorization.

21289820572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807 (or 744 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 21289820572 in words is "twenty-one billion, two hundred eighty-nine million, eight hundred twenty thousand, five hundred seventy-two".