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11222020 = 225561101
BaseRepresentation
bin101010110011…
…110000000100
3210010010201101
4222303300010
510333101040
61040305444
7164246155
oct52636004
923103641
1011222020
1163752a7
123912284
13242bb64
1416c192c
15eba09a
hexab3c04

11222020 has 12 divisors (see below), whose sum is σ = 23566284. Its totient is φ = 4488800.

The previous prime is 11221993. The next prime is 11222021. The reversal of 11222020 is 2022211.

It can be written as a sum of positive squares in 2 ways, for example, as 8856576 + 2365444 = 2976^2 + 1538^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 11221988 and 11222006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222021) 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, 280531 + ... + 280570.

It is an arithmetic number, because the mean of its divisors is an integer number (1963857).

Almost surely, 211222020 is an apocalyptic number.

11222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11222020 is an abundant number, since it is smaller than the sum of its proper divisors (12344264).

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

11222020 is a wasteful number, since it uses less digits than its factorization.

11222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561110 (or 561108 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 11222020 is about 3349.9283574429. The cubic root of 11222020 is about 223.8843205851.

Adding to 11222020 its reverse (2022211), we get a palindrome (13244231).

The spelling of 11222020 in words is "eleven million, two hundred twenty-two thousand, twenty".

Divisors: 1 2 4 5 10 20 561101 1122202 2244404 2805505 5611010 11222020