20021113033 has 4 divisors (see below), whose sum is σ = 20023354260. Its totient is φ = 20018871808.

The previous prime is 20021113001. The next prime is 20021113037. The reversal of 20021113033 is 33031112002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4493959369 + 15527153664 = 67037^2 + 124608^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021113033 - 2⁵ = 20021113001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021112998 and 20021113016.

It is not an unprimeable number, because it can be changed into a prime (20021113037) 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 3 ways as a sum of consecutive naturals, for example, 1107160 + ... + 1125097.

It is an arithmetic number, because the mean of its divisors is an integer number (5005838565).

Almost surely, 2^20021113033 is an apocalyptic number.

It is an amenable number.

20021113033 is a deficient number, since it is larger than the sum of its proper divisors (2241227).

20021113033 is an equidigital number, since it uses as much as digits as its factorization.

20021113033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241226.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20021113033 its reverse (33031112002), we get a palindrome (53052225035).

The spelling of 20021113033 in words is "twenty billion, twenty-one million, one hundred thirteen thousand, thirty-three".