21332983478312 has 64 divisors (see below), whose sum is σ = 44575459660800. Its totient is φ = 9488069141440.

The previous prime is 21332983478273. The next prime is 21332983478363. The reversal of 21332983478312 is 21387438923312.

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, 15568139 + ... + 16882917.

It is an arithmetic number, because the mean of its divisors is an integer number (696491557200).

Almost surely, 2^{21332983478312} is an apocalyptic number.

21332983478312 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 21332983478312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22287729830400).

21332983478312 is an abundant number, since it is smaller than the sum of its proper divisors (23242476182488).

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

21332983478312 is a wasteful number, since it uses less digits than its factorization.

21332983478312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318766 (or 1318762 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 56.

The spelling of 21332983478312 in words is "twenty-one trillion, three hundred thirty-two billion, nine hundred eighty-three million, four hundred seventy-eight thousand, three hundred twelve".