20202021223 has 4 divisors (see below), whose sum is σ = 20202777000. Its totient is φ = 20201265448.

The previous prime is 20202021199. The next prime is 20202021269. The reversal of 20202021223 is 32212020202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32212020202 = 2 ⋅16106010101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20202021223 is a prime.

It is a super-2 number, since 2×20202021223² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20202021197 and 20202021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202024223) 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, 336265 + ... + 391762.

It is an arithmetic number, because the mean of its divisors is an integer number (5050694250).

Almost surely, 2^20202021223 is an apocalyptic number.

20202021223 is a deficient number, since it is larger than the sum of its proper divisors (755777).

20202021223 is an equidigital number, since it uses as much as digits as its factorization.

20202021223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755776.

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 20202021223 its reverse (32212020202), we get a palindrome (52414041425).

The spelling of 20202021223 in words is "twenty billion, two hundred two million, twenty-one thousand, two hundred twenty-three".