20011100011 has 4 divisors (see below), whose sum is σ = 22869828592. Its totient is φ = 17152371432.

The previous prime is 20011099981. The next prime is 20011100023. The reversal of 20011100011 is 11000111002.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20011100011 - 2¹⁵ = 20011067243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7), and also a Moran number because the ratio is a prime number: 2858728573 = 20011100011 / (2 + 0 + 0 + 1 + 1 + 1 + 0 + 0 + 0 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011099967 and 20011100003.

It is not an unprimeable number, because it can be changed into a prime (20011100041) 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, 1429364280 + ... + 1429364293.

It is an arithmetic number, because the mean of its divisors is an integer number (5717457148).

Almost surely, 2^20011100011 is an apocalyptic number.

20011100011 is a deficient number, since it is larger than the sum of its proper divisors (2858728581).

20011100011 is an equidigital number, since it uses as much as digits as its factorization.

20011100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858728580.

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

Adding to 20011100011 its reverse (11000111002), we get a palindrome (31011211013).

The spelling of 20011100011 in words is "twenty billion, eleven million, one hundred thousand, eleven".