21519012710 has 16 divisors (see below), whose sum is σ = 41713778736. Its totient is φ = 7945481568.

The previous prime is 21519012703. The next prime is 21519012769. The reversal of 21519012710 is 1721091512.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82765304 + ... + 82765563.

It is an arithmetic number, because the mean of its divisors is an integer number (2607111171).

Almost surely, 2^21519012710 is an apocalyptic number.

21519012710 is a deficient number, since it is larger than the sum of its proper divisors (20194766026).

21519012710 is a wasteful number, since it uses less digits than its factorization.

21519012710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165530887.

The product of its (nonzero) digits is 1260, while the sum is 29.

The spelling of 21519012710 in words is "twenty-one billion, five hundred nineteen million, twelve thousand, seven hundred ten".