21470065612016 has 160 divisors (see below), whose sum is σ = 51415020418560. Its totient is φ = 8478352954368.

The previous prime is 21470065612013. The next prime is 21470065612031. The reversal of 21470065612016 is 61021656007412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21470065612013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213087986 + ... + 213188718.

It is an arithmetic number, because the mean of its divisors is an integer number (321343877616).

Almost surely, 2^{21470065612016} 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 21470065612016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25707510209280).

21470065612016 is an abundant number, since it is smaller than the sum of its proper divisors (29944954806544).

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

21470065612016 is a wasteful number, since it uses less digits than its factorization.

21470065612016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103511 (or 103505 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 21470065612016 in words is "twenty-one trillion, four hundred seventy billion, sixty-five million, six hundred twelve thousand, sixteen".