21943736512512 has 208 divisors, whose sum is σ = 61103943656448. Its totient is φ = 6990759198720.

The previous prime is 21943736512501. The next prime is 21943736512531. The reversal of 21943736512512 is 21521563734912.

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, 347878608 + ... + 347941680.

Almost surely, 2^{21943736512512} 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 21943736512512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30551971828224).

21943736512512 is an abundant number, since it is smaller than the sum of its proper divisors (39160207143936).

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

21943736512512 is a wasteful number, since it uses less digits than its factorization.

21943736512512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64354 (or 64332 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 51.

The spelling of 21943736512512 in words is "twenty-one trillion, nine hundred forty-three billion, seven hundred thirty-six million, five hundred twelve thousand, five hundred twelve".