1985468020 has 24 divisors (see below), whose sum is σ = 4170734568. Its totient is φ = 793948800.

The previous prime is 1985468003. The next prime is 1985468021. The reversal of 1985468020 is 208645891.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 578017764 + 1407450256 = 24042^2 + 37516^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985468021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63430 + ... + 89410.

It is an arithmetic number, because the mean of its divisors is an integer number (173780607).

Almost surely, 2^1985468020 is an apocalyptic number.

1985468020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1985468020 is an abundant number, since it is smaller than the sum of its proper divisors (2185266548).

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

1985468020 is a wasteful number, since it uses less digits than its factorization.

1985468020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29811 (or 29809 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 1985468020 is about 44558.5908664087. The cubic root of 1985468020 is about 1256.8621045500.

The spelling of 1985468020 in words is "one billion, nine hundred eighty-five million, four hundred sixty-eight thousand, twenty".