1685370020 has 48 divisors (see below), whose sum is σ = 3581601408. Its totient is φ = 666132480.

The previous prime is 1685369989. The next prime is 1685370047. The reversal of 1685370020 is 200735861.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 672089 + ... + 674591.

It is an arithmetic number, because the mean of its divisors is an integer number (74616696).

Almost surely, 2^1685370020 is an apocalyptic number.

1685370020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1685370020 is an abundant number, since it is smaller than the sum of its proper divisors (1896231388).

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

1685370020 is a wasteful number, since it uses less digits than its factorization.

1685370020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2900 (or 2898 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1685370020 is about 41053.2583359713. The cubic root of 1685370020 is about 1190.0496695602.

The spelling of 1685370020 in words is "one billion, six hundred eighty-five million, three hundred seventy thousand, twenty".