21108368514 has 8 divisors (see below), whose sum is σ = 42216737040. Its totient is φ = 7036122836.

The previous prime is 21108368483. The next prime is 21108368579. The reversal of 21108368514 is 41586380112.

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

21108368514 is an admirable number.

It is a Curzon 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, 1759030704 + ... + 1759030715.

It is an arithmetic number, because the mean of its divisors is an integer number (5277092130).

Almost surely, 2^21108368514 is an apocalyptic number.

21108368514 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.

21108368514 is a wasteful number, since it uses less digits than its factorization.

21108368514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3518061424.

The product of its (nonzero) digits is 46080, while the sum is 39.

The spelling of 21108368514 in words is "twenty-one billion, one hundred eight million, three hundred sixty-eight thousand, five hundred fourteen".