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20011110001 = 106318825127
BaseRepresentation
bin10010101000110000…
…010100111001110001
31220122121102201022021
4102220300110321301
5311440321010001
613105403311441
71305615425401
oct225060247161
956577381267
1020011110001
118539828143
123a6581b581
131b6ba977bc
14d7b978801
157c1c12ba1
hex4a8c14e71

20011110001 has 4 divisors (see below), whose sum is σ = 20029936192. Its totient is φ = 19992283812.

The previous prime is 20011109971. The next prime is 20011110019. The reversal of 20011110001 is 10001111002.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10001111002 = 25000555501.

It is a cyclic number.

It is not a de Polignac number, because 20011110001 - 25 = 20011109969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011110101) 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, 9411501 + ... + 9413626.

It is an arithmetic number, because the mean of its divisors is an integer number (5007484048).

Almost surely, 220011110001 is an apocalyptic number.

It is an amenable number.

20011110001 is a deficient number, since it is larger than the sum of its proper divisors (18826191).

20011110001 is a wasteful number, since it uses less digits than its factorization.

20011110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18826190.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 20011110001 its reverse (10001111002), we get a palindrome (30012221003).

The spelling of 20011110001 in words is "twenty billion, eleven million, one hundred ten thousand, one".

Divisors: 1 1063 18825127 20011110001