21776467712 has 72 divisors (see below), whose sum is σ = 45648619296. Its totient is φ = 10348056576.

The previous prime is 21776467693. The next prime is 21776467733.

21776467712 is nontrivially palindromic in base 10.

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, 912638 + ... + 936194.

Almost surely, 2^21776467712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21776467712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22824309648).

21776467712 is an abundant number, since it is smaller than the sum of its proper divisors (23872151584).

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

21776467712 is a wasteful number, since it uses less digits than its factorization.

21776467712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23753 (or 23739 counting only the distinct ones).

The product of its digits is 1382976, while the sum is 50.

The spelling of 21776467712 in words is "twenty-one billion, seven hundred seventy-six million, four hundred sixty-seven thousand, seven hundred twelve".