21334684616 has 64 divisors (see below), whose sum is σ = 49227004800. Its totient is φ = 8459707392.

The previous prime is 21334684577. The next prime is 21334684639. The reversal of 21334684616 is 61648643312.

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, 133751 + ... + 246086.

It is an arithmetic number, because the mean of its divisors is an integer number (769171950).

Almost surely, 2^21334684616 is an apocalyptic number.

It is an amenable number.

21334684616 is an abundant number, since it is smaller than the sum of its proper divisors (27892320184).

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

21334684616 is a wasteful number, since it uses less digits than its factorization.

21334684616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379926 (or 379922 counting only the distinct ones).

The product of its digits is 497664, while the sum is 44.

The spelling of 21334684616 in words is "twenty-one billion, three hundred thirty-four million, six hundred eighty-four thousand, six hundred sixteen".