1020109995 has 24 divisors (see below), whose sum is σ = 1768961376. Its totient is φ = 543821568.

The previous prime is 1020109991. The next prime is 1020110033. The reversal of 1020109995 is 5999010201.

It is not a de Polignac number, because 1020109995 - 2² = 1020109991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020109991) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 159907 + ... + 166163.

It is an arithmetic number, because the mean of its divisors is an integer number (73706724).

Almost surely, 2^1020109995 is an apocalyptic number.

1020109995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1020109995 is a deficient number, since it is larger than the sum of its proper divisors (748851381).

1020109995 is a wasteful number, since it uses less digits than its factorization.

1020109995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9891 (or 9888 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 36.

The square root of 1020109995 is about 31939.1608374422. The cubic root of 1020109995 is about 1006.6588923984.

The spelling of 1020109995 in words is "one billion, twenty million, one hundred nine thousand, nine hundred ninety-five".