21203210230 has 32 divisors (see below), whose sum is σ = 38634133824. Its totient is φ = 8377623936.

The previous prime is 21203210219. The next prime is 21203210233. The reversal of 21203210230 is 3201230212.

It is a super-2 number, since 2×21203210230² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203210233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382984 + ... + 434836.

It is an arithmetic number, because the mean of its divisors is an integer number (1207316682).

Almost surely, 2^21203210230 is an apocalyptic number.

21203210230 is a deficient number, since it is larger than the sum of its proper divisors (17430923594).

21203210230 is a wasteful number, since it uses less digits than its factorization.

21203210230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52360.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21203210230 its reverse (3201230212), we get a palindrome (24404440442).

The spelling of 21203210230 in words is "twenty-one billion, two hundred three million, two hundred ten thousand, two hundred thirty".