20382880 has 48 divisors (see below), whose sum is σ = 55036800. Its totient is φ = 6988032.

The previous prime is 20382833. The next prime is 20382889. The reversal of 20382880 is 8828302.

It is not an unprimeable number, because it can be changed into a prime (20382889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7980 + ... + 10219.

It is an arithmetic number, because the mean of its divisors is an integer number (1146600).

Almost surely, 2^20382880 is an apocalyptic number.

20382880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20382880 is an abundant number, since it is smaller than the sum of its proper divisors (34653920).

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

20382880 is a wasteful number, since it uses less digits than its factorization.

20382880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18221 (or 18213 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 20382880 is about 4514.7403026088. The cubic root of 20382880 is about 273.1629846090.

The spelling of 20382880 in words is "twenty million, three hundred eighty-two thousand, eight hundred eighty".