1000005020 has 24 divisors (see below), whose sum is σ = 2400012384. Its totient is φ = 342858816.

The previous prime is 1000005001. The next prime is 1000005029. The reversal of 1000005020 is 205000001.

It is a junction number, because it is equal to n+sod(n) for n = 1000004989 and 1000005007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000005029) 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, 3571307 + ... + 3571586.

It is an arithmetic number, because the mean of its divisors is an integer number (100000516).

Almost surely, 2^1000005020 is an apocalyptic number.

1000005020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000005020 is an abundant number, since it is smaller than the sum of its proper divisors (1400007364).

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

1000005020 is a wasteful number, since it uses less digits than its factorization.

1000005020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7142909 (or 7142907 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 8.

The square root of 1000005020 is about 31622.8559747535. The cubic root of 1000005020 is about 1000.0016733305.

Adding to 1000005020 its reverse (205000001), we get a palindrome (1205005021).

The spelling of 1000005020 in words is "one billion, five thousand, twenty".