Search a number
-
+
20100222 = 2321765687
BaseRepresentation
bin100110010101…
…1010001111110
31101211012022200
41030223101332
520121201342
61554452330
7332564142
oct114532176
941735280
1020100222
111038965a
1268940a6
134219c2c
142953222
151b7094c
hex132b47e

20100222 has 24 divisors (see below), whose sum is σ = 46112976. Its totient is φ = 6305856.

The previous prime is 20100217. The next prime is 20100251. The reversal of 20100222 is 22200102.

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

It is a congruent number.

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, 32538 + ... + 33149.

It is an arithmetic number, because the mean of its divisors is an integer number (1921374).

Almost surely, 220100222 is an apocalyptic number.

20100222 is an abundant number, since it is smaller than the sum of its proper divisors (26012754).

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

20100222 is a wasteful number, since it uses less digits than its factorization.

20100222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65712 (or 65709 counting only the distinct ones).

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

The square root of 20100222 is about 4483.3271127590. The cubic root of 20100222 is about 271.8944136751.

Adding to 20100222 its reverse (22200102), we get a palindrome (42300324).

The spelling of 20100222 in words is "twenty million, one hundred thousand, two hundred twenty-two".

Divisors: 1 2 3 6 9 17 18 34 51 102 153 306 65687 131374 197061 394122 591183 1116679 1182366 2233358 3350037 6700074 10050111 20100222