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20272528 = 241996367
BaseRepresentation
bin100110101010…
…1010110010000
31102010221200101
41031111112100
520142210103
62002302144
7334212403
oct115252620
942127611
1020272528
1110497061
126957954
13427a4a3
142999d3a
151ba6a1d
hex1355590

20272528 has 20 divisors (see below), whose sum is σ = 39481600. Its totient is φ = 10083744.

The previous prime is 20272489. The next prime is 20272529. The reversal of 20272528 is 82527202.

20272528 is a nontrivial binomial coefficient, being equal to C(6368, 2).

It is a junction number, because it is equal to n+sod(n) for n = 20272496 and 20272505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20272529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 6367.

It is an arithmetic number, because the mean of its divisors is an integer number (1974080).

Almost surely, 220272528 is an apocalyptic number.

20272528 is the 6367-th triangular number and also the 3184-th hexagonal number.

20272528 is the 2123-rd centered nonagonal number.

It is an amenable number.

20272528 is a deficient number, since it is larger than the sum of its proper divisors (19209072).

20272528 is a wasteful number, since it uses less digits than its factorization.

20272528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6574 (or 6568 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 20272528 is about 4502.5024153242. The cubic root of 20272528 is about 272.6691282377.

The spelling of 20272528 in words is "twenty million, two hundred seventy-two thousand, five hundred twenty-eight".

Divisors: 1 2 4 8 16 199 398 796 1592 3184 6367 12734 25468 50936 101872 1267033 2534066 5068132 10136264 20272528