20011100033 has 4 divisors (see below), whose sum is σ = 20350271280. Its totient is φ = 19671928788.

The previous prime is 20011100023. The next prime is 20011100041. The reversal of 20011100033 is 33000111002.

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: 33000111002 = 2 ⋅16500055501.

It is a cyclic number.

It is not a de Polignac number, because 20011100033 - 2¹⁶ = 20011034497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011099987 and 20011100023.

It is not an unprimeable number, because it can be changed into a prime (20011100023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169585535 + ... + 169585652.

It is an arithmetic number, because the mean of its divisors is an integer number (5087567820).

Almost surely, 2^20011100033 is an apocalyptic number.

It is an amenable number.

20011100033 is a deficient number, since it is larger than the sum of its proper divisors (339171247).

20011100033 is an equidigital number, since it uses as much as digits as its factorization.

20011100033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339171246.

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 20011100033 its reverse (33000111002), we get a palindrome (53011211035).

The spelling of 20011100033 in words is "twenty billion, eleven million, one hundred thousand, thirty-three".