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BaseRepresentation
bin11000011010110100
312002012110
4120122310
511200040
62051020
7564414
oct303264
9162173
10100020
1169168
1249a70
13366ab
1428644
151e980
hex186b4

100020 has 24 divisors (see below), whose sum is σ = 280224. Its totient is φ = 26656.

The previous prime is 100019. The next prime is 100043. The reversal of 100020 is 20001.

It is a Harshad number since it is a multiple of its sum of digits (3).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 99978 and 100014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 774 + ... + 893.

It is an arithmetic number, because the mean of its divisors is an integer number (11676).

2100020 is an apocalyptic number.

100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100020 is an abundant number, since it is smaller than the sum of its proper divisors (180204).

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

100020 is a wasteful number, since it uses less digits than its factorization.

100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679 (or 1677 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 3.

The square root of 100020 is about 316.2593872125. The cubic root of 100020 is about 46.4189825224.

Adding to 100020 its reverse (20001), we get a palindrome (120021).

The spelling of 100020 in words is "one hundred thousand, twenty", and thus it is an iban number.