21376035566016 has 112 divisors (see below), whose sum is σ = 56875180615680. Its totient is φ = 7085341716480.

The previous prime is 21376035565999. The next prime is 21376035566069. The reversal of 21376035566016 is 61066553067312.

It is a super-2 number, since 2×21376035566016² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21376035566016.

It is a congruent number.

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, 97401240 + ... + 97620456.

It is an arithmetic number, because the mean of its divisors is an integer number (507814112640).

Almost surely, 2^{21376035566016} 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 21376035566016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28437590307840).

21376035566016 is an abundant number, since it is smaller than the sum of its proper divisors (35499145049664).

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

21376035566016 is a wasteful number, since it uses less digits than its factorization.

21376035566016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222082 (or 222072 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 51.

The spelling of 21376035566016 in words is "twenty-one trillion, three hundred seventy-six billion, thirty-five million, five hundred sixty-six thousand, sixteen".