1683868020 has 96 divisors (see below), whose sum is σ = 5011953408. Its totient is φ = 420943872.

The previous prime is 1683868007. The next prime is 1683868057. The reversal of 1683868020 is 208683861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 265122 + ... + 271398.

It is an arithmetic number, because the mean of its divisors is an integer number (52207848).

Almost surely, 2^1683868020 is an apocalyptic number.

1683868020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1683868020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2505976704).

1683868020 is an abundant number, since it is smaller than the sum of its proper divisors (3328085388).

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

1683868020 is a wasteful number, since it uses less digits than its factorization.

1683868020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6569 (or 6567 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 1683868020 is about 41034.9609479527. The cubic root of 1683868020 is about 1189.6960408143.

The spelling of 1683868020 in words is "one billion, six hundred eighty-three million, eight hundred sixty-eight thousand, twenty".