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22021340 = 22511199503
BaseRepresentation
bin101010000000…
…0010011011100
31112102210121012
41110000103130
521114140330
62103554352
7355115105
oct124002334
945383535
1022021340
1111480a60
12745b9b8
1347404a3
142cd33ac
151deec95
hex15004dc

22021340 has 48 divisors (see below), whose sum is σ = 50803200. Its totient is φ = 7951680.

The previous prime is 22021331. The next prime is 22021357. The reversal of 22021340 is 4312022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43529 + ... + 44031.

It is an arithmetic number, because the mean of its divisors is an integer number (1058400).

Almost surely, 222021340 is an apocalyptic number.

22021340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22021340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25401600).

22021340 is an abundant number, since it is smaller than the sum of its proper divisors (28781860).

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

22021340 is a wasteful number, since it uses less digits than its factorization.

22021340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22021340 is about 4692.6900600828. The cubic root of 22021340 is about 280.2945030592.

Adding to 22021340 its reverse (4312022), we get a palindrome (26333362).

The spelling of 22021340 in words is "twenty-two million, twenty-one thousand, three hundred forty".

Divisors: 1 2 4 5 10 11 20 22 44 55 110 199 220 398 503 796 995 1006 1990 2012 2189 2515 3980 4378 5030 5533 8756 10060 10945 11066 21890 22132 27665 43780 55330 100097 110660 200194 400388 500485 1000970 1101067 2001940 2202134 4404268 5505335 11010670 22021340