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2020180 = 225101009
BaseRepresentation
bin111101101001101010100
310210122011111
413231031110
51004121210
6111144404
723112511
oct7551524
93718144
102020180
11115a878
12815104
13559696
143a8308
1529d88a
hex1ed354

2020180 has 12 divisors (see below), whose sum is σ = 4242420. Its totient is φ = 808064.

The previous prime is 2020171. The next prime is 2020181. The reversal of 2020180 is 810202.

It can be written as a sum of positive squares in 2 ways, for example, as 345744 + 1674436 = 588^2 + 1294^2 .

It is a super-2 number, since 2×20201802 = 8162254464800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2020180.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020181) 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, 50485 + ... + 50524.

It is an arithmetic number, because the mean of its divisors is an integer number (353535).

22020180 is an apocalyptic number.

2020180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2020180 is an abundant number, since it is smaller than the sum of its proper divisors (2222240).

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

2020180 is a wasteful number, since it uses less digits than its factorization.

2020180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101018 (or 101016 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2020180 is about 1421.3303627236. The cubic root of 2020180 is about 126.4144411477.

Adding to 2020180 its reverse (810202), we get a palindrome (2830382).

The spelling of 2020180 in words is "two million, twenty thousand, one hundred eighty".

Divisors: 1 2 4 5 10 20 101009 202018 404036 505045 1010090 2020180