21463567716 has 12 divisors (see below), whose sum is σ = 50081658032. Its totient is φ = 7154522568.

The previous prime is 21463567711. The next prime is 21463567717. The reversal of 21463567716 is 61776536412.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (21463567711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 894315310 + ... + 894315333.

Almost surely, 2^21463567716 is an apocalyptic number.

It is an amenable number.

21463567716 is an abundant number, since it is smaller than the sum of its proper divisors (28618090316).

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

21463567716 is a wasteful number, since it uses less digits than its factorization.

21463567716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788630650 (or 1788630648 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 48.

The spelling of 21463567716 in words is "twenty-one billion, four hundred sixty-three million, five hundred sixty-seven thousand, seven hundred sixteen".