21517105606030 has 32 divisors (see below), whose sum is σ = 39135697334496. Its totient is φ = 8516888346624.

The previous prime is 21517105606021. The next prime is 21517105606097. The reversal of 21517105606030 is 3060650171512.

It is a super-2 number, since 2×21517105606030² (a number of 27 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 15 ways as a sum of consecutive naturals, for example, 5177997 + ... + 8357383.

It is an arithmetic number, because the mean of its divisors is an integer number (1222990541703).

Almost surely, 2^{21517105606030} is an apocalyptic number.

21517105606030 is a deficient number, since it is larger than the sum of its proper divisors (17618591728466).

21517105606030 is a wasteful number, since it uses less digits than its factorization.

21517105606030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3186468.

The product of its (nonzero) digits is 37800, while the sum is 37.

Adding to 21517105606030 its reverse (3060650171512), we get a palindrome (24577755777542).

The spelling of 21517105606030 in words is "twenty-one trillion, five hundred seventeen billion, one hundred five million, six hundred six thousand, thirty".