20920832 has 40 divisors (see below), whose sum is σ = 43272900. Its totient is φ = 10092544.

The previous prime is 20920819. The next prime is 20920841. The reversal of 20920832 is 23802902.

It can be written as a sum of positive squares in 2 ways, for example, as 18800896 + 2119936 = 4336^2 + 1456^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14144 + ... + 15552.

Almost surely, 2^20920832 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 20920832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21636450).

20920832 is an abundant number, since it is smaller than the sum of its proper divisors (22352068).

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

20920832 is an equidigital number, since it uses as much as digits as its factorization.

20920832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456 (or 1440 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20920832 is about 4573.9296015571. The cubic root of 20920832 is about 275.5452850066.

The spelling of 20920832 in words is "twenty million, nine hundred twenty thousand, eight hundred thirty-two".