20330120021 has 8 divisors (see below), whose sum is σ = 21530159640. Its totient is φ = 19130541568.

The previous prime is 20330119991. The next prime is 20330120033. The reversal of 20330120021 is 12002103302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 218625796 + 20111494225 = 14786^2 + 141815^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20330120021 - 2¹⁴ = 20330103637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20330119978 and 20330120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20330120081) 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 7 ways as a sum of consecutive naturals, for example, 22376 + ... + 202881.

It is an arithmetic number, because the mean of its divisors is an integer number (2691269955).

Almost surely, 2^20330120021 is an apocalyptic number.

It is an amenable number.

20330120021 is a deficient number, since it is larger than the sum of its proper divisors (1200039619).

20330120021 is a wasteful number, since it uses less digits than its factorization.

20330120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230583.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20330120021 its reverse (12002103302), we get a palindrome (32332223323).

It can be divided in two parts, 203301 and 20021, that added together give a palindrome (223322).

The spelling of 20330120021 in words is "twenty billion, three hundred thirty million, one hundred twenty thousand, twenty-one".