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20283025 = 527115903
BaseRepresentation
bin100110101011…
…1111010010001
31102011111002011
41031113322101
520143024100
62002422521
7334255120
oct115277221
942144064
1020283025
11104a3a34
126961a41
1342821b9
14299dab7
151ba9bba
hex1357e91

20283025 has 12 divisors (see below), whose sum is σ = 28744192. Its totient is φ = 13908240.

The previous prime is 20283007. The next prime is 20283037. The reversal of 20283025 is 52038202.

It is not a de Polignac number, because 20283025 - 213 = 20274833 is a prime.

It is a super-3 number, since 3×202830253 (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20282987 and 20283005.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57777 + ... + 58126.

Almost surely, 220283025 is an apocalyptic number.

20283025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20283025 is a deficient number, since it is larger than the sum of its proper divisors (8461167).

20283025 is a wasteful number, since it uses less digits than its factorization.

20283025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115920 (or 115915 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20283025 is about 4503.6679495718. The cubic root of 20283025 is about 272.7161822931.

The spelling of 20283025 in words is "twenty million, two hundred eighty-three thousand, twenty-five".

Divisors: 1 5 7 25 35 175 115903 579515 811321 2897575 4056605 20283025