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20663655536 = 241291478471
BaseRepresentation
bin10011001111101001…
…100101110001110000
31222100002022110111102
4103033221211301300
5314304343434121
613254233503532
71331031113456
oct231751456160
958302273442
1020663655536
118844105277
124008271ba8
131c44030314
1410004bc9d6
1580e15e90b
hex4cfa65c70

20663655536 has 10 divisors (see below), whose sum is σ = 40035832632. Its totient is φ = 10331827760.

The previous prime is 20663655497. The next prime is 20663655539. The reversal of 20663655536 is 63555636602.

It is a super-2 number, since 2×206636555362 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20663655539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645739220 + ... + 645739251.

Almost surely, 220663655536 is an apocalyptic number.

It is an amenable number.

20663655536 is a deficient number, since it is larger than the sum of its proper divisors (19372177096).

20663655536 is a wasteful number, since it uses less digits than its factorization.

20663655536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291478479 (or 1291478473 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 47.

The spelling of 20663655536 in words is "twenty billion, six hundred sixty-three million, six hundred fifty-five thousand, five hundred thirty-six".