20683894 has 32 divisors (see below), whose sum is σ = 40723200. Its totient is φ = 7633440.

The previous prime is 20683889. The next prime is 20683907. The reversal of 20683894 is 49838602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 609 + ... + 6460.

It is an arithmetic number, because the mean of its divisors is an integer number (1272600).

Almost surely, 2^20683894 is an apocalyptic number.

20683894 is a deficient number, since it is larger than the sum of its proper divisors (20039306).

20683894 is a wasteful number, since it uses less digits than its factorization.

20683894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7108.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 20683894 is about 4547.9549250185. The cubic root of 20683894 is about 274.5011076008.

It can be divided in two parts, 206 and 83894, that added together give a square (84100 = 290²).

The spelling of 20683894 in words is "twenty million, six hundred eighty-three thousand, eight hundred ninety-four".