21470433512 has 64 divisors (see below), whose sum is σ = 44593804800. Its totient is φ = 9609208000.

The previous prime is 21470433511. The next prime is 21470433529. The reversal of 21470433512 is 21533407412.

It is not an unprimeable number, because it can be changed into a prime (21470433511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6065039 + ... + 6068577.

It is an arithmetic number, because the mean of its divisors is an integer number (696778200).

Almost surely, 2^21470433512 is an apocalyptic number.

21470433512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21470433512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22296902400).

21470433512 is an abundant number, since it is smaller than the sum of its proper divisors (23123371288).

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

21470433512 is a wasteful number, since it uses less digits than its factorization.

21470433512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4598 (or 4594 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 21470433512 in words is "twenty-one billion, four hundred seventy million, four hundred thirty-three thousand, five hundred twelve".