1002020004 has 48 divisors (see below), whose sum is σ = 2599914240. Its totient is φ = 333738720.

The previous prime is 1002019999. The next prime is 1002020009. The reversal of 1002020004 is 4000202001.

It is an interprime number because it is at equal distance from previous prime (1002019999) and next prime (1002020009).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1002020009) 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 15 ways as a sum of consecutive naturals, for example, 168034 + ... + 173894.

It is an arithmetic number, because the mean of its divisors is an integer number (54164880).

Almost surely, 2^1002020004 is an apocalyptic number.

It is an amenable number.

1002020004 is an abundant number, since it is smaller than the sum of its proper divisors (1597894236).

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

1002020004 is a wasteful number, since it uses less digits than its factorization.

1002020004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7457 (or 7449 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 1002020004 is about 31654.6995563060. The cubic root of 1002020004 is about 1000.6728817952.

Adding to 1002020004 its reverse (4000202001), we get a palindrome (5002222005).

The spelling of 1002020004 in words is "one billion, two million, twenty thousand, four".