20963328 has 56 divisors (see below), whose sum is σ = 55964328. Its totient is φ = 6979584.

The previous prime is 20963287. The next prime is 20963339. The reversal of 20963328 is 82336902.

It is a super-2 number, since 2×20963328² = 878922241671168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24150 + ... + 25002.

It is an arithmetic number, because the mean of its divisors is an integer number (999363).

Almost surely, 2^20963328 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 20963328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27982164).

20963328 is an abundant number, since it is smaller than the sum of its proper divisors (35001000).

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

20963328 is an frugal number, since it uses more digits than its factorization.

20963328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882 (or 858 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 20963328 is about 4578.5727033651. The cubic root of 20963328 is about 275.7317284028.

The spelling of 20963328 in words is "twenty million, nine hundred sixty-three thousand, three hundred twenty-eight".