20016003 has 32 divisors (see below), whose sum is σ = 32947200. Its totient is φ = 10555776.

The previous prime is 20015981. The next prime is 20016013. The reversal of 20016003 is 30061002.

It is not a de Polignac number, because 20016003 - 2¹⁰ = 20014979 is a prime.

20016003 is a modest number, since divided by 6003 gives 2001 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 20016003.

It is not an unprimeable number, because it can be changed into a prime (20016013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13293 + ... + 14721.

It is an arithmetic number, because the mean of its divisors is an integer number (1029600).

Almost surely, 2^20016003 is an apocalyptic number.

20016003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20016003 is a deficient number, since it is larger than the sum of its proper divisors (12931197).

20016003 is a wasteful number, since it uses less digits than its factorization.

20016003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 20016003 is about 4473.9247870298. The cubic root of 20016003 is about 271.5141404002.

Adding to 20016003 its reverse (30061002), we get a palindrome (50077005).

The spelling of 20016003 in words is "twenty million, sixteen thousand, three".