20021100033 has 32 divisors (see below), whose sum is σ = 31402022400. Its totient is φ = 11214979200.

The previous prime is 20021100031. The next prime is 20021100037. The reversal of 20021100033 is 33000112002.

It is a happy number.

It is not a de Polignac number, because 20021100033 - 2¹ = 20021100031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20021099991 and 20021100018.

It is not an unprimeable number, because it can be changed into a prime (20021100031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 363703 + ... + 415116.

It is an arithmetic number, because the mean of its divisors is an integer number (981313200).

Almost surely, 2^20021100033 is an apocalyptic number.

It is an amenable number.

20021100033 is a deficient number, since it is larger than the sum of its proper divisors (11380922367).

20021100033 is a wasteful number, since it uses less digits than its factorization.

20021100033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778893.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 20021100033 its reverse (33000112002), we get a palindrome (53021212035).

The spelling of 20021100033 in words is "twenty billion, twenty-one million, one hundred thousand, thirty-three".