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2000020 = 225119091
BaseRepresentation
bin111101000010010010100
310202121111211
413220102110
51003000040
6110511204
722666651
oct7502224
93677454
102000020
111146710
12805504
13550459
143a0c28
152978ea
hex1e8494

2000020 has 24 divisors (see below), whose sum is σ = 4582368. Its totient is φ = 727200.

The previous prime is 2000003. The next prime is 2000029. The reversal of 2000020 is 200002.

Adding to 2000020 its reverse (200002), we get a palindrome (2200022).

2000020 = 2302 + 2312 + ... + 2622.

It is a Harshad number since it is a multiple of its sum of digits (4).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 1999973 and 2000009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4326 + ... + 4765.

It is an arithmetic number, because the mean of its divisors is an integer number (190932).

22000020 is an apocalyptic number.

2000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2000020 is an abundant number, since it is smaller than the sum of its proper divisors (2582348).

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

2000020 is a wasteful number, since it uses less digits than its factorization.

2000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9111 (or 9109 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 4.

The square root of 2000020 is about 1414.2206334232. The cubic root of 2000020 is about 125.9925249618.

The spelling of 2000020 in words is "two million, twenty", and thus it is an aban number and an uban number.

Divisors: 1 2 4 5 10 11 20 22 44 55 110 220 9091 18182 36364 45455 90910 100001 181820 200002 400004 500005 1000010 2000020