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10002020 = 225771443
BaseRepresentation
bin100110001001…
…111001100100
3200211011012012
4212021321210
510030031040
6554213352
7151005260
oct46117144
920734165
1010002020
115711736
123424258
1320c2772
1414850a0
15d28865
hex989e64

10002020 has 24 divisors (see below), whose sum is σ = 24005184. Its totient is φ = 3429216.

The previous prime is 10002019. The next prime is 10002029. The reversal of 10002020 is 2020001.

It is a Harshad number since it is a multiple of its sum of digits (5).

10002020 is a modest number, since divided by 2020 gives 1000 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 10001995 and 10002013.

It is not an unprimeable number, because it can be changed into a prime (10002029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35582 + ... + 35861.

It is an arithmetic number, because the mean of its divisors is an integer number (1000216).

Almost surely, 210002020 is an apocalyptic number.

10002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10002020 is an abundant number, since it is smaller than the sum of its proper divisors (14003164).

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

10002020 is a wasteful number, since it uses less digits than its factorization.

10002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71459 (or 71457 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 10002020 is about 3162.5970340845. The cubic root of 10002020 is about 215.4579745534.

Adding to 10002020 its reverse (2020001), we get a palindrome (12022021).

The spelling of 10002020 in words is "ten million, two thousand, twenty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 140 71443 142886 285772 357215 500101 714430 1000202 1428860 2000404 2500505 5001010 10002020