16020004 has 48 divisors (see below), whose sum is σ = 37650816. Its totient is φ = 5760000.

The previous prime is 16019999. The next prime is 16020007. The reversal of 16020004 is 40002061.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (16020007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2004 + ... + 6004.

It is an arithmetic number, because the mean of its divisors is an integer number (784392).

Almost surely, 2^16020004 is an apocalyptic number.

16020004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16020004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18825408).

16020004 is an abundant number, since it is smaller than the sum of its proper divisors (21630812).

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

16020004 is a wasteful number, since it uses less digits than its factorization.

16020004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4036 (or 4034 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 16020004 is about 4002.4997189257. The cubic root of 16020004 is about 252.0891806641.

Adding to 16020004 its reverse (40002061), we get a palindrome (56022065).

It can be divided in two parts, 160 and 20004, that added together give a square (20164 = 142²).

The spelling of 16020004 in words is "sixteen million, twenty thousand, four".