20687382 has 24 divisors (see below), whose sum is σ = 46369440. Its totient is φ = 6657840.

The previous prime is 20687377. The next prime is 20687383. The reversal of 20687382 is 28378602.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20687383) 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 11 ways as a sum of consecutive naturals, for example, 19294 + ... + 20337.

It is an arithmetic number, because the mean of its divisors is an integer number (1932060).

Almost surely, 2^20687382 is an apocalyptic number.

20687382 is an abundant number, since it is smaller than the sum of its proper divisors (25682058).

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

20687382 is a wasteful number, since it uses less digits than its factorization.

20687382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39668 (or 39665 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 20687382 is about 4548.3383779134. The cubic root of 20687382 is about 274.5165367724.

The spelling of 20687382 in words is "twenty million, six hundred eighty-seven thousand, three hundred eighty-two".