21031020230 has 32 divisors (see below), whose sum is σ = 41997242880. Its totient is φ = 7518020320.

The previous prime is 21031020119. The next prime is 21031020239. The reversal of 21031020230 is 3202013012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031020239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1613774 + ... + 1626753.

It is an arithmetic number, because the mean of its divisors is an integer number (1312413840).

Almost surely, 2^21031020230 is an apocalyptic number.

21031020230 is a deficient number, since it is larger than the sum of its proper divisors (20966222650).

21031020230 is a wasteful number, since it uses less digits than its factorization.

21031020230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240604.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21031020230 its reverse (3202013012), we get a palindrome (24233033242).

The spelling of 21031020230 in words is "twenty-one billion, thirty-one million, twenty thousand, two hundred thirty".