1680000020 has 24 divisors (see below), whose sum is σ = 3531082464. Its totient is φ = 671412896.

The previous prime is 1680000013. The next prime is 1680000029. The reversal of 1680000020 is 200000861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680000029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12854 + ... + 59373.

It is an arithmetic number, because the mean of its divisors is an integer number (147128436).

Almost surely, 2^1680000020 is an apocalyptic number.

1680000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1680000020 is an abundant number, since it is smaller than the sum of its proper divisors (1851082444).

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

1680000020 is a wasteful number, since it uses less digits than its factorization.

1680000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73399 (or 73397 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1680000020 is about 40987.8033078134. The cubic root of 1680000020 is about 1188.7843952700.

Adding to 1680000020 its reverse (200000861), we get a palindrome (1880000881).

The spelling of 1680000020 in words is "one billion, six hundred eighty million, twenty", and thus it is an aban number.