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BaseRepresentation
bin10010101000000110…
…010100111010100001
31220121211201100102111
4102220012110322201
5311430011200001
613104331315321
71305423021310
oct225006247241
956554640374
1020000100001
118533598172
123a61babb41
131b697112cb
14d7a310277
157c0c8a851
hex4a8194ea1

20000100001 has 4 divisors (see below), whose sum is σ = 22857257152. Its totient is φ = 17142942852.

The previous prime is 20000099969. The next prime is 20000100013. The reversal of 20000100001 is 10000100002.

Adding to 20000100001 its reverse (10000100002), we get a palindrome (30000200003).

Subtracting from 20000100001 its reverse (10000100002), we obtain a palindrome (9999999999).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20000100001 - 25 = 20000099969 is a prime.

It is a pancake number, because a pancake can be divided into 20000100001 parts by 200000 straight cuts.

It is a Duffinian number.

20000100001 is a modest number, since divided by 100001 gives 2 as remainder.

It is not an unprimeable number, because it can be changed into a prime (20000100301) 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, 1428578565 + ... + 1428578578.

It is an arithmetic number, because the mean of its divisors is an integer number (5714314288).

Almost surely, 220000100001 is an apocalyptic number.

It is an amenable number.

20000100001 is a deficient number, since it is larger than the sum of its proper divisors (2857157151).

20000100001 is an equidigital number, since it uses as much as digits as its factorization.

20000100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857157150.

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

The spelling of 20000100001 in words is "twenty billion, one hundred thousand, one".

Divisors: 1 7 2857157143 20000100001