20411328 has 56 divisors (see below), whose sum is σ = 61724032. Its totient is φ = 5831424.

The previous prime is 20411323. The next prime is 20411329. The reversal of 20411328 is 82311402.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20411323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6250 + ... + 8937.

Almost surely, 2^20411328 is an apocalyptic number.

20411328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20411328 is an abundant number, since it is smaller than the sum of its proper divisors (41312704).

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

20411328 is a wasteful number, since it uses less digits than its factorization.

20411328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15209 (or 15199 counting only the distinct ones).

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

The square root of 20411328 is about 4517.8897728918. The cubic root of 20411328 is about 273.2900083357.

The spelling of 20411328 in words is "twenty million, four hundred eleven thousand, three hundred twenty-eight".