20230123021 has 8 divisors (see below), whose sum is σ = 21270792600. Its totient is φ = 19212325440.

The previous prime is 20230123009. The next prime is 20230123027. The reversal of 20230123021 is 12032103202.

It can be written as a sum of positive squares in 4 ways, for example, as 521894025 + 19708228996 = 22845^2 + 140386^2 .

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 20230123021 - 2¹¹ = 20230120973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20230122986 and 20230123004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20230123027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5716186 + ... + 5719723.

It is an arithmetic number, because the mean of its divisors is an integer number (2658849075).

Almost surely, 2^20230123021 is an apocalyptic number.

It is an amenable number.

20230123021 is a deficient number, since it is larger than the sum of its proper divisors (1040669579).

20230123021 is a wasteful number, since it uses less digits than its factorization.

20230123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11435999.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20230123021 its reverse (12032103202), we get a palindrome (32262226223).

The spelling of 20230123021 in words is "twenty billion, two hundred thirty million, one hundred twenty-three thousand, twenty-one".