21030217330 has 16 divisors (see below), whose sum is σ = 38777669784. Its totient is φ = 8206913920.

The previous prime is 21030217277. The next prime is 21030217331. The reversal of 21030217330 is 3371203012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16151613921 + 4878603409 = 127089^2 + 69847^2 .

It is not an unprimeable number, because it can be changed into a prime (21030217331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25646197 + ... + 25647016.

Almost surely, 2^21030217330 is an apocalyptic number.

21030217330 is a deficient number, since it is larger than the sum of its proper divisors (17747452454).

21030217330 is a wasteful number, since it uses less digits than its factorization.

21030217330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51293261.

The product of its (nonzero) digits is 756, while the sum is 22.

The spelling of 21030217330 in words is "twenty-one billion, thirty million, two hundred seventeen thousand, three hundred thirty".