21505613630034 has 8 divisors (see below), whose sum is σ = 43011227260080. Its totient is φ = 7168537876676.

The previous prime is 21505613630021. The next prime is 21505613630093. The reversal of 21505613630034 is 43003631650512.

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

21505613630034 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21505613629974 and 21505613630001.

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, 1792134469164 + ... + 1792134469175.

It is an arithmetic number, because the mean of its divisors is an integer number (5376403407510).

Almost surely, 2^{21505613630034} is an apocalyptic number.

21505613630034 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21505613630034 is a wasteful number, since it uses less digits than its factorization.

21505613630034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3584268938344.

The product of its (nonzero) digits is 194400, while the sum is 39.

The spelling of 21505613630034 in words is "twenty-one trillion, five hundred five billion, six hundred thirteen million, six hundred thirty thousand, thirty-four".