20905682 has 24 divisors (see below), whose sum is σ = 38077824. Its totient is φ = 8430912.

The previous prime is 20905679. The next prime is 20905711. The reversal of 20905682 is 28650902.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1463 + ... + 6629.

It is an arithmetic number, because the mean of its divisors is an integer number (1586576).

Almost surely, 2^20905682 is an apocalyptic number.

20905682 is a deficient number, since it is larger than the sum of its proper divisors (17172142).

20905682 is a wasteful number, since it uses less digits than its factorization.

20905682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5210 (or 5193 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 20905682 is about 4572.2731764408. The cubic root of 20905682 is about 275.4787561174.

The spelling of 20905682 in words is "twenty million, nine hundred five thousand, six hundred eighty-two".