1683700020 has 60 divisors (see below), whose sum is σ = 5281834404. Its totient is φ = 448986240.

The previous prime is 1683700003. The next prime is 1683700037. The reversal of 1683700020 is 200073861.

It is an interprime number because it is at equal distance from previous prime (1683700003) and next prime (1683700037).

It can be written as a sum of positive squares in 2 ways, for example, as 235745316 + 1447954704 = 15354^2 + 38052^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 518041 + ... + 521280.

Almost surely, 2^1683700020 is an apocalyptic number.

1683700020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1683700020 is an abundant number, since it is smaller than the sum of its proper divisors (3598134384).

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

1683700020 is a wasteful number, since it uses less digits than its factorization.

1683700020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039342 (or 1039331 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1683700020 is about 41032.9138619231. The cubic root of 1683700020 is about 1189.6564740589.

Adding to 1683700020 its reverse (200073861), we get a palindrome (1883773881).

The spelling of 1683700020 in words is "one billion, six hundred eighty-three million, seven hundred thousand, twenty".