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20000066 = 239725189
BaseRepresentation
bin100110001001…
…0110101000010
31101122002221012
41030102311002
520110000231
61552400522
7331666142
oct114226502
941562835
1020000066
1110320389
126846142
1341b3478
142928922
151b50e2b
hex1312d42

20000066 has 8 divisors (see below), whose sum is σ = 30076860. Its totient is φ = 9974448.

The previous prime is 20000063. The next prime is 20000069. The reversal of 20000066 is 66000002.

It is an interprime number because it is at equal distance from previous prime (20000063) and next prime (20000069).

It can be written as a sum of positive squares in 2 ways, for example, as 17181025 + 2819041 = 4145^2 + 1679^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

20000066 is a modest number, since divided by 66 gives 20 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 20000066.

It is not an unprimeable number, because it can be changed into a prime (20000063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11801 + ... + 13388.

Almost surely, 220000066 is an apocalyptic number.

20000066 is a deficient number, since it is larger than the sum of its proper divisors (10076794).

20000066 is a wasteful number, since it uses less digits than its factorization.

20000066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25588.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20000066 is about 4472.1433340178. The cubic root of 20000066 is about 271.4420602451.

Adding to 20000066 its reverse (66000002), we get a palindrome (86000068).

The spelling of 20000066 in words is "twenty million, sixty-six", and thus it is an aban number and an uban number.

Divisors: 1 2 397 794 25189 50378 10000033 20000066