21023203011030 has 72 divisors (see below), whose sum is σ = 60081186818016. Its totient is φ = 5096534060640.

The previous prime is 21023203010959. The next prime is 21023203011037. The reversal of 21023203011030 is 3011030232012.

21023203011030 is a `hidden beast` number, since 2 + 1 + 0 + 2 + 320 + 301 + 10 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21023203010994 and 21023203011012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023203011037) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 965241774 + ... + 965263553.

It is an arithmetic number, because the mean of its divisors is an integer number (834460928028).

Almost surely, 2^{21023203011030} is an apocalyptic number.

21023203011030 is an abundant number, since it is smaller than the sum of its proper divisors (39057983806986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21023203011030 is a wasteful number, since it uses less digits than its factorization.

21023203011030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930505362 (or 1930505348 counting only the distinct ones).

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

Adding to 21023203011030 its reverse (3011030232012), we get a palindrome (24034233243042).

The spelling of 21023203011030 in words is "twenty-one trillion, twenty-three billion, two hundred three million, eleven thousand, thirty".