21350130210 has 24 divisors (see below), whose sum is σ = 55510338780. Its totient is φ = 5693368032.

The previous prime is 21350130169. The next prime is 21350130229. The reversal of 21350130210 is 1203105312.

21350130210 is a `hidden beast` number, since 2 + 1 + 350 + 1 + 302 + 10 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21003835329 + 346294881 = 144927^2 + 18609^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118611745 + ... + 118611924.

Almost surely, 2^21350130210 is an apocalyptic number.

21350130210 is an abundant number, since it is smaller than the sum of its proper divisors (34160208570).

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

21350130210 is a wasteful number, since it uses less digits than its factorization.

21350130210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237223682 (or 237223679 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

Adding to 21350130210 its reverse (1203105312), we get a palindrome (22553235522).

The spelling of 21350130210 in words is "twenty-one billion, three hundred fifty million, one hundred thirty thousand, two hundred ten".