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20338180 = 2251016909
BaseRepresentation
bin100110110010…
…1011000000100
31102021021201221
41031211120010
520201310210
62003530124
7334604662
oct115453004
942237657
1020338180
1110531415
126989944
1342a1335
1429b5c32
151bbb1da
hex1365604

20338180 has 12 divisors (see below), whose sum is σ = 42710220. Its totient is φ = 8135264.

The previous prime is 20338133. The next prime is 20338181. The reversal of 20338180 is 8183302.

It can be written as a sum of positive squares in 2 ways, for example, as 3968064 + 16370116 = 1992^2 + 4046^2 .

It is not an unprimeable number, because it can be changed into a prime (20338181) 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, 508435 + ... + 508474.

It is an arithmetic number, because the mean of its divisors is an integer number (3559185).

Almost surely, 220338180 is an apocalyptic number.

20338180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20338180 is an abundant number, since it is smaller than the sum of its proper divisors (22372040).

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

20338180 is a wasteful number, since it uses less digits than its factorization.

20338180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016918 (or 1016916 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 20338180 is about 4509.7871346661. The cubic root of 20338180 is about 272.9631547818.

It can be divided in two parts, 203 and 38180, that added together give a palindrome (38383).

The spelling of 20338180 in words is "twenty million, three hundred thirty-eight thousand, one hundred eighty".

Divisors: 1 2 4 5 10 20 1016909 2033818 4067636 5084545 10169090 20338180