20230210021 has 24 divisors (see below), whose sum is σ = 25002614520. Its totient is φ = 16289707392.

The previous prime is 20230210019. The next prime is 20230210087. The reversal of 20230210021 is 12001203202.

It can be written as a sum of positive squares in 4 ways, for example, as 8943484900 + 11286725121 = 94570^2 + 106239^2 .

It is not a de Polignac number, because 20230210021 - 2¹ = 20230210019 is a prime.

It is a super-2 number, since 2×20230210021² (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 = 20230209983 and 20230210010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20230210621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139810 + ... + 244963.

It is an arithmetic number, because the mean of its divisors is an integer number (1041775605).

Almost surely, 2^20230210021 is an apocalyptic number.

It is an amenable number.

20230210021 is a deficient number, since it is larger than the sum of its proper divisors (4772404499).

20230210021 is a wasteful number, since it uses less digits than its factorization.

20230210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384853 (or 384846 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20230210021 its reverse (12001203202), we get a palindrome (32231413223).

The spelling of 20230210021 in words is "twenty billion, two hundred thirty million, two hundred ten thousand, twenty-one".