1995965820 has 48 divisors (see below), whose sum is σ = 6209673120. Its totient is φ = 532257408.

The previous prime is 1995965819. The next prime is 1995965863. The reversal of 1995965820 is 285695991.

1995965820 is a `hidden beast` number, since 1 + 9 + 9 + 59 + 6 + 582 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1847577 + ... + 1848656.

It is an arithmetic number, because the mean of its divisors is an integer number (129368190).

Almost surely, 2^1995965820 is an apocalyptic number.

1995965820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1995965820 is an abundant number, since it is smaller than the sum of its proper divisors (4213707300).

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

1995965820 is a wasteful number, since it uses less digits than its factorization.

1995965820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3696251 (or 3696243 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 54.

The square root of 1995965820 is about 44676.2332790042. The cubic root of 1995965820 is about 1259.0733549633.

The spelling of 1995965820 in words is "one billion, nine hundred ninety-five million, nine hundred sixty-five thousand, eight hundred twenty".