Search a number
BaseRepresentation
bin10010101110101001…
…100011111110000000
31220220111111211212211
4102232221203332000
5312141130000000
613123255031504
71311226115416
oct225651437600
956814454784
1020110000000
11858a630712
123a9296b594
131b8640ccac
14d8ab5b2b6
157ca7487ba
hex4aea63f80

20110000000 has 128 divisors (see below), whose sum is σ = 50103387360. Its totient is φ = 8040000000.

The previous prime is 20109999989. The next prime is 20110000003. The reversal of 20110000000 is 1102.

Adding to 20110000000 its reverse (1102), we get a palindrome (20110001102).

It is a tau number, because it is divible by the number of its divisors (128).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110000003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9998995 + ... + 10001005.

Almost surely, 220110000000 is an apocalyptic number.

20110000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20110000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25051693680).

20110000000 is an abundant number, since it is smaller than the sum of its proper divisors (29993387360).

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

20110000000 is an frugal number, since it uses more digits than its factorization.

20110000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060 (or 2018 counting only the distinct ones).

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

The spelling of 20110000000 in words is "twenty billion, one hundred ten million", and thus it is an aban number.