21014328 has 64 divisors (see below), whose sum is σ = 55044000. Its totient is φ = 6676992.

The previous prime is 21014327. The next prime is 21014333. The reversal of 21014328 is 82341012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014327) 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, 75726 + ... + 76002.

Almost surely, 2^21014328 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 21014328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27522000).

21014328 is an abundant number, since it is smaller than the sum of its proper divisors (34029672).

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

21014328 is a wasteful number, since it uses less digits than its factorization.

21014328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 21014328 is about 4584.1387413559. The cubic root of 21014328 is about 275.9551491917.

The spelling of 21014328 in words is "twenty-one million, fourteen thousand, three hundred twenty-eight".