20837982 has 32 divisors (see below), whose sum is σ = 45777024. Its totient is φ = 6271200.

The previous prime is 20837981. The next prime is 20838011. The reversal of 20837982 is 28973802.

It is a self number, because there is not a number n which added to its sum of digits gives 20837982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20837981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9357 + ... + 11367.

It is an arithmetic number, because the mean of its divisors is an integer number (1430532).

Almost surely, 2^20837982 is an apocalyptic number.

20837982 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20837982 is an abundant number, since it is smaller than the sum of its proper divisors (24939042).

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

20837982 is a wasteful number, since it uses less digits than its factorization.

20837982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 20837982 is about 4564.8638533915. The cubic root of 20837982 is about 275.1810686314.

The spelling of 20837982 in words is "twenty million, eight hundred thirty-seven thousand, nine hundred eighty-two".