21003103230 has 16 divisors (see below), whose sum is σ = 50407447824. Its totient is φ = 5600827520.

The previous prime is 21003103207. The next prime is 21003103273. The reversal of 21003103230 is 3230130012.

It is a super-2 number, since 2×21003103230² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350051691 + ... + 350051750.

It is an arithmetic number, because the mean of its divisors is an integer number (3150465489).

Almost surely, 2^21003103230 is an apocalyptic number.

21003103230 is an abundant number, since it is smaller than the sum of its proper divisors (29404344594).

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

21003103230 is a wasteful number, since it uses less digits than its factorization.

21003103230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700103451.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21003103230 its reverse (3230130012), we get a palindrome (24233233242).

The spelling of 21003103230 in words is "twenty-one billion, three million, one hundred three thousand, two hundred thirty".