20021330229 has 4 divisors (see below), whose sum is σ = 26695106976. Its totient is φ = 13347553484.

The previous prime is 20021330209. The next prime is 20021330239. The reversal of 20021330229 is 92203312002.

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.

It is a cyclic number.

It is not a de Polignac number, because 20021330229 - 2²⁸ = 19752894773 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20021330199 and 20021330208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021330209) 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, 3336888369 + ... + 3336888374.

It is an arithmetic number, because the mean of its divisors is an integer number (6673776744).

Almost surely, 2^20021330229 is an apocalyptic number.

It is an amenable number.

20021330229 is a deficient number, since it is larger than the sum of its proper divisors (6673776747).

20021330229 is an equidigital number, since it uses as much as digits as its factorization.

20021330229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6673776746.

The product of its (nonzero) digits is 1296, while the sum is 24.

The spelling of 20021330229 in words is "twenty billion, twenty-one million, three hundred thirty thousand, two hundred twenty-nine".