20683800 has 72 divisors (see below), whose sum is σ = 69469140. Its totient is φ = 5515200.

The previous prime is 20683787. The next prime is 20683801. The reversal of 20683800 is 838602.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20683801) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3946 + ... + 7545.

Almost surely, 2^20683800 is an apocalyptic number.

20683800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20683800 is an abundant number, since it is smaller than the sum of its proper divisors (48785340).

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

20683800 is a wasteful number, since it uses less digits than its factorization.

20683800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11513 (or 11501 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20683800 is about 4547.9445906915. The cubic root of 20683800 is about 274.5006917677.

The spelling of 20683800 in words is "twenty million, six hundred eighty-three thousand, eight hundred".