20030231013021 has 24 divisors (see below), whose sum is σ = 29866688606976. Its totient is φ = 12922372955520.

The previous prime is 20030231013019. The next prime is 20030231013061. The reversal of 20030231013021 is 12031013203002.

20030231013021 is a `hidden beast` number, since 2 + 0 + 0 + 302 + 310 + 1 + 30 + 21 = 666.

It is not a de Polignac number, because 20030231013021 - 2¹ = 20030231013019 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20030231012985 and 20030231013003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20030231013061) 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, 9326266 + ... + 11271188.

It is an arithmetic number, because the mean of its divisors is an integer number (1244445358624).

Almost surely, 2^{20030231013021} is an apocalyptic number.

It is an amenable number.

20030231013021 is a deficient number, since it is larger than the sum of its proper divisors (9836457593955).

20030231013021 is a wasteful number, since it uses less digits than its factorization.

20030231013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981873 (or 1981870 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20030231013021 its reverse (12031013203002), we get a palindrome (32061244216023).

The spelling of 20030231013021 in words is "twenty trillion, thirty billion, two hundred thirty-one million, thirteen thousand, twenty-one".