20713782 has 8 divisors (see below), whose sum is σ = 41427576. Its totient is φ = 6904592.

The previous prime is 20713741. The next prime is 20713799. The reversal of 20713782 is 28731702.

It is a sphenic number, since it is the product of 3 distinct primes.

20713782 is an admirable number.

It is a congruent number.

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, 1726143 + ... + 1726154.

It is an arithmetic number, because the mean of its divisors is an integer number (5178447).

Almost surely, 2^20713782 is an apocalyptic number.

20713782 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20713782 is a wasteful number, since it uses less digits than its factorization.

20713782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3452302.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 20713782 is about 4551.2396113586. The cubic root of 20713782 is about 274.6332609979.

The spelling of 20713782 in words is "twenty million, seven hundred thirteen thousand, seven hundred eighty-two".