2003021445 has 32 divisors (see below), whose sum is σ = 3422315520. Its totient is φ = 998161920.

The previous prime is 2003021431. The next prime is 2003021479. The reversal of 2003021445 is 5441203002.

It is not a de Polignac number, because 2003021445 - 2⁹ = 2003020933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60784 + ... + 87753.

It is an arithmetic number, because the mean of its divisors is an integer number (106947360).

Almost surely, 2^2003021445 is an apocalyptic number.

It is an amenable number.

2003021445 is a deficient number, since it is larger than the sum of its proper divisors (1419294075).

2003021445 is a wasteful number, since it uses less digits than its factorization.

2003021445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148605.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 2003021445 is about 44755.1275833284. The cubic root of 2003021445 is about 1260.5551943560. Note that the first 3 decimals are identical.

Adding to 2003021445 its reverse (5441203002), we get a palindrome (7444224447).

The spelling of 2003021445 in words is "two billion, three million, twenty-one thousand, four hundred forty-five".