21203110230 has 64 divisors (see below), whose sum is σ = 54872294400. Its totient is φ = 5225921280.

The previous prime is 21203110219. The next prime is 21203110273. The reversal of 21203110230 is 3201130212.

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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 430270 + ... + 477009.

It is an arithmetic number, because the mean of its divisors is an integer number (857379600).

Almost surely, 2^21203110230 is an apocalyptic number.

21203110230 is an abundant number, since it is smaller than the sum of its proper divisors (33669184170).

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

21203110230 is a wasteful number, since it uses less digits than its factorization.

21203110230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907349.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21203110230 its reverse (3201130212), we get a palindrome (24404240442).

The spelling of 21203110230 in words is "twenty-one billion, two hundred three million, one hundred ten thousand, two hundred thirty".