20926728 has 128 divisors (see below), whose sum is σ = 63504000. Its totient is φ = 6359040.

The previous prime is 20926723. The next prime is 20926729. The reversal of 20926728 is 82762902.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20926692 and 20926701.

It is not an unprimeable number, because it can be changed into a prime (20926723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150483 + ... + 150621.

It is an arithmetic number, because the mean of its divisors is an integer number (496125).

Almost surely, 2^20926728 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 20926728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31752000).

20926728 is an abundant number, since it is smaller than the sum of its proper divisors (42577272).

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

20926728 is a wasteful number, since it uses less digits than its factorization.

20926728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 20926728 is about 4574.5740785345. The cubic root of 20926728 is about 275.5711676995.

The spelling of 20926728 in words is "twenty million, nine hundred twenty-six thousand, seven hundred twenty-eight".