20682736 has 20 divisors (see below), whose sum is σ = 40176000. Its totient is φ = 10314752.

The previous prime is 20682719. The next prime is 20682743. The reversal of 20682736 is 63728602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5745 + ... + 8623.

It is an arithmetic number, because the mean of its divisors is an integer number (2008800).

Almost surely, 2^20682736 is an apocalyptic number.

It is an amenable number.

20682736 is a deficient number, since it is larger than the sum of its proper divisors (19493264).

20682736 is a wasteful number, since it uses less digits than its factorization.

20682736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336 (or 3330 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 20682736 is about 4547.8276132677. The cubic root of 20682736 is about 274.4959848031.

The spelling of 20682736 in words is "twenty million, six hundred eighty-two thousand, seven hundred thirty-six".