20683888 has 20 divisors (see below), whose sum is σ = 41159320. Its totient is φ = 10062144.

The previous prime is 20683879. The next prime is 20683889. The reversal of 20683888 is 88838602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20683889) 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 3 ways as a sum of consecutive naturals, for example, 16878 + ... + 18061.

It is an arithmetic number, because the mean of its divisors is an integer number (2057966).

Almost surely, 2^20683888 is an apocalyptic number.

It is an amenable number.

20683888 is a deficient number, since it is larger than the sum of its proper divisors (20475432).

20683888 is a wasteful number, since it uses less digits than its factorization.

20683888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34984 (or 34978 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 20683888 is about 4547.9542653813. The cubic root of 20683888 is about 274.5010810583.

The spelling of 20683888 in words is "twenty million, six hundred eighty-three thousand, eight hundred eighty-eight".