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101000020 = 22511459091
BaseRepresentation
bin1100000010100…
…10001101010100
321001001022222111
412001102031110
5201324000040
614004440404
72334325462
oct601221524
9231038874
10101000020
11520148a0
12299a9104
1317c03a34
14d5b1832
158d00dea
hex6052354

101000020 has 24 divisors (see below), whose sum is σ = 231382368. Its totient is φ = 36727200.

The previous prime is 100999993. The next prime is 101000023. The reversal of 101000020 is 20000101.

It is a Harshad number since it is a multiple of its sum of digits (4).

It is a junction number, because it is equal to n+sod(n) for n = 100999973 and 101000009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101000023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229326 + ... + 229765.

It is an arithmetic number, because the mean of its divisors is an integer number (9640932).

Almost surely, 2101000020 is an apocalyptic number.

101000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101000020 is an abundant number, since it is smaller than the sum of its proper divisors (130382348).

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

101000020 is a wasteful number, since it uses less digits than its factorization.

101000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459111 (or 459109 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 4.

The square root of 101000020 is about 10049.8766161580. The cubic root of 101000020 is about 465.7009815197.

Adding to 101000020 its reverse (20000101), we get a palindrome (121000121).

The spelling of 101000020 in words is "one hundred one million, twenty", and thus it is an aban number.

Divisors: 1 2 4 5 10 11 20 22 44 55 110 220 459091 918182 1836364 2295455 4590910 5050001 9181820 10100002 20200004 25250005 50500010 101000020