20330223021 has 16 divisors (see below), whose sum is σ = 30188747520. Its totient is φ = 13522027680.

The previous prime is 20330222993. The next prime is 20330223031. The reversal of 20330223021 is 12032203302.

It is a happy number.

It is not a de Polignac number, because 20330223021 - 2¹⁷ = 20330091949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20330222985 and 20330223003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20330223031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 861880 + ... + 885153.

It is an arithmetic number, because the mean of its divisors is an integer number (1886796720).

Almost surely, 2^20330223021 is an apocalyptic number.

It is an amenable number.

20330223021 is a deficient number, since it is larger than the sum of its proper divisors (9858524499).

20330223021 is a wasteful number, since it uses less digits than its factorization.

20330223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747473 (or 1747467 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20330223021 its reverse (12032203302), we get a palindrome (32362426323).

The spelling of 20330223021 in words is "twenty billion, three hundred thirty million, two hundred twenty-three thousand, twenty-one".