2003020042 has 4 divisors (see below), whose sum is σ = 3004530066. Its totient is φ = 1001510020.

The previous prime is 2003020039. The next prime is 2003020093. The reversal of 2003020042 is 2400203002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1327072041 + 675948001 = 36429^2 + 25999^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500755009 + ... + 500755012.

Almost surely, 2^2003020042 is an apocalyptic number.

2003020042 is a deficient number, since it is larger than the sum of its proper divisors (1001510024).

2003020042 is a wasteful number, since it uses less digits than its factorization.

2003020042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001510023.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 2003020042 is about 44755.1119091440. Note that the first 3 decimals coincide. The cubic root of 2003020042 is about 1260.5549000407.

Adding to 2003020042 its reverse (2400203002), we get a palindrome (4403223044).

The spelling of 2003020042 in words is "two billion, three million, twenty thousand, forty-two".