21302023210 has 16 divisors (see below), whose sum is σ = 41293152936. Its totient is φ = 7865362368.

The previous prime is 21302023199. The next prime is 21302023279. The reversal of 21302023210 is 1232020312.

It can be written as a sum of positive squares in 4 ways, for example, as 18300407841 + 3001615369 = 135279^2 + 54787^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81930729 + ... + 81930988.

Almost surely, 2^21302023210 is an apocalyptic number.

21302023210 is a deficient number, since it is larger than the sum of its proper divisors (19991129726).

21302023210 is a wasteful number, since it uses less digits than its factorization.

21302023210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163861737.

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

Adding to 21302023210 its reverse (1232020312), we get a palindrome (22534043522).

The spelling of 21302023210 in words is "twenty-one billion, three hundred two million, twenty-three thousand, two hundred ten".