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20220210 = 2325224669
BaseRepresentation
bin100110100100…
…0100100110010
31102001021220200
41031020210302
520134021320
62001220030
7333604023
oct115104462
942037820
1020220210
111046081a
126931616
13425c72a
142984c4a
151b96290
hex1348932

20220210 has 24 divisors (see below), whose sum is σ = 52572780. Its totient is φ = 5392032.

The previous prime is 20220173. The next prime is 20220217. The reversal of 20220210 is 1202202.

It can be written as a sum of positive squares in 2 ways, for example, as 18844281 + 1375929 = 4341^2 + 1173^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20220192 and 20220201.

It is not an unprimeable number, because it can be changed into a prime (20220217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112245 + ... + 112424.

Almost surely, 220220210 is an apocalyptic number.

20220210 is an abundant number, since it is smaller than the sum of its proper divisors (32352570).

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

20220210 is a wasteful number, since it uses less digits than its factorization.

20220210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224682 (or 224679 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 20220210 is about 4496.6887817593. The cubic root of 20220210 is about 272.4343640139.

Adding to 20220210 its reverse (1202202), we get a palindrome (21422412).

The spelling of 20220210 in words is "twenty million, two hundred twenty thousand, two hundred ten".

Divisors: 1 2 3 5 6 9 10 15 18 30 45 90 224669 449338 674007 1123345 1348014 2022021 2246690 3370035 4044042 6740070 10110105 20220210