21316834716 has 24 divisors (see below), whose sum is σ = 51083586960. Its totient is φ = 6913567872.

The previous prime is 21316834687. The next prime is 21316834793. The reversal of 21316834716 is 61743861312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24005001 + ... + 24005888.

It is an arithmetic number, because the mean of its divisors is an integer number (2128482790).

Almost surely, 2^21316834716 is an apocalyptic number.

It is an amenable number.

21316834716 is an abundant number, since it is smaller than the sum of its proper divisors (29766752244).

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

21316834716 is a wasteful number, since it uses less digits than its factorization.

21316834716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48010933 (or 48010931 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The spelling of 21316834716 in words is "twenty-one billion, three hundred sixteen million, eight hundred thirty-four thousand, seven hundred sixteen".