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22002020 = 2251100101
BaseRepresentation
bin101001111101…
…1100101100100
31112101211002122
41103323211210
521113031040
62103325112
7355004555
oct123734544
945354078
1022002020
1111468497
127450798
134734761
142cca32c
151de91b5
hex14fb964

22002020 has 12 divisors (see below), whose sum is σ = 46204284. Its totient is φ = 8800800.

The previous prime is 22002011. The next prime is 22002023. The reversal of 22002020 is 2020022.

It can be written as a sum of positive squares in 2 ways, for example, as 9498724 + 12503296 = 3082^2 + 3536^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22001989 and 22002007.

It is not an unprimeable number, because it can be changed into a prime (22002023) 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, 550031 + ... + 550070.

It is an arithmetic number, because the mean of its divisors is an integer number (3850357).

Almost surely, 222002020 is an apocalyptic number.

22002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22002020 is an abundant number, since it is smaller than the sum of its proper divisors (24202264).

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

22002020 is a wasteful number, since it uses less digits than its factorization.

22002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100110 (or 1100108 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 8.

The square root of 22002020 is about 4690.6310876043. The cubic root of 22002020 is about 280.2125087416.

Adding to 22002020 its reverse (2020022), we get a palindrome (24022042).

The spelling of 22002020 in words is "twenty-two million, two thousand, twenty".

Divisors: 1 2 4 5 10 20 1100101 2200202 4400404 5500505 11001010 22002020