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19701666 = 23210110837
BaseRepresentation
bin100101100100…
…1111110100010
31101001221121100
41023021332202
520020423131
61542135230
7326314155
oct113117642
941057540
1019701666
1110137176
126721516
13410a6ba
14288bc9c
151ae27e6
hex12c9fa2

19701666 has 24 divisors (see below), whose sum is σ = 43113564. Its totient is φ = 6501600.

The previous prime is 19701659. The next prime is 19701677. The reversal of 19701666 is 66610791.

It can be written as a sum of positive squares in 2 ways, for example, as 19316025 + 385641 = 4395^2 + 621^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19701666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3601 + ... + 7236.

Almost surely, 219701666 is an apocalyptic number.

19701666 is an abundant number, since it is smaller than the sum of its proper divisors (23411898).

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

19701666 is a wasteful number, since it uses less digits than its factorization.

19701666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10946 (or 10943 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 19701666 is about 4438.6558776278. The cubic root of 19701666 is about 270.0853228285.

The spelling of 19701666 in words is "nineteen million, seven hundred one thousand, six hundred sixty-six".

Divisors: 1 2 3 6 9 18 101 202 303 606 909 1818 10837 21674 32511 65022 97533 195066 1094537 2189074 3283611 6567222 9850833 19701666