21030217318 has 8 divisors (see below), whose sum is σ = 34413082920. Its totient is φ = 9559189680.

The previous prime is 21030217277. The next prime is 21030217331. The reversal of 21030217318 is 81371203012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21030217318² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477959463 + ... + 477959506.

It is an arithmetic number, because the mean of its divisors is an integer number (4301635365).

Almost surely, 2^21030217318 is an apocalyptic number.

21030217318 is a deficient number, since it is larger than the sum of its proper divisors (13382865602).

21030217318 is a wasteful number, since it uses less digits than its factorization.

21030217318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955918982.

The product of its (nonzero) digits is 2016, while the sum is 28.

The spelling of 21030217318 in words is "twenty-one billion, thirty million, two hundred seventeen thousand, three hundred eighteen".