20013321003 has 16 divisors (see below), whose sum is σ = 28843132416. Its totient is φ = 12270437280.

The previous prime is 20013320927. The next prime is 20013321007. The reversal of 20013321003 is 30012331002.

It is not a de Polignac number, because 20013321003 - 2¹³ = 20013312811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20013321007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 936225 + ... + 957362.

It is an arithmetic number, because the mean of its divisors is an integer number (1802695776).

Almost surely, 2^20013321003 is an apocalyptic number.

20013321003 is a deficient number, since it is larger than the sum of its proper divisors (8829811413).

20013321003 is a wasteful number, since it uses less digits than its factorization.

20013321003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893874.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 20013321003 its reverse (30012331002), we get a palindrome (50025652005).

Subtracting 20013321003 from its reverse (30012331002), we obtain a palindrome (9999009999).

The spelling of 20013321003 in words is "twenty billion, thirteen million, three hundred twenty-one thousand, three".