21004103003 has 8 divisors (see below), whose sum is σ = 22638468048. Its totient is φ = 19372404384.

The previous prime is 21004102997. The next prime is 21004103011. The reversal of 21004103003 is 30030140012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21004103003 - 2²⁰ = 21003054427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21004103053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650225 + ... + 681762.

It is an arithmetic number, because the mean of its divisors is an integer number (2829808506).

Almost surely, 2^21004103003 is an apocalyptic number.

21004103003 is a deficient number, since it is larger than the sum of its proper divisors (1634365045).

21004103003 is a wasteful number, since it uses less digits than its factorization.

21004103003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333213.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21004103003 its reverse (30030140012), we get a palindrome (51034243015).

The spelling of 21004103003 in words is "twenty-one billion, four million, one hundred three thousand, three".