20332928 has 64 divisors (see below), whose sum is σ = 50526720. Its totient is φ = 7918080.

The previous prime is 20332919. The next prime is 20332951. The reversal of 20332928 is 82923302.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×20332928² = 826855922106368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20332928.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8825 + ... + 10887.

It is an arithmetic number, because the mean of its divisors is an integer number (789480).

Almost surely, 2^20332928 is an apocalyptic number.

20332928 is a gapful number since it is divisible by the number (28) 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 20332928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25263360).

20332928 is an abundant number, since it is smaller than the sum of its proper divisors (30193792).

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

20332928 is a wasteful number, since it uses less digits than its factorization.

20332928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095 (or 2083 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20332928 is about 4509.2048079456. The cubic root of 20332928 is about 272.9396566794.

The spelling of 20332928 in words is "twenty million, three hundred thirty-two thousand, nine hundred twenty-eight".