21013023003 has 32 divisors (see below), whose sum is σ = 32604278784. Its totient is φ = 11789455392.

The previous prime is 21013022999. The next prime is 21013023011. The reversal of 21013023003 is 30032031012.

It is not a de Polignac number, because 21013023003 - 2² = 21013022999 is a prime.

It is a super-3 number, since 3×21013023003³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21013022003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 407626 + ... + 456272.

It is an arithmetic number, because the mean of its divisors is an integer number (1018883712).

Almost surely, 2^21013023003 is an apocalyptic number.

21013023003 is a deficient number, since it is larger than the sum of its proper divisors (11591255781).

21013023003 is a wasteful number, since it uses less digits than its factorization.

21013023003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49031.

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

Adding to 21013023003 its reverse (30032031012), we get a palindrome (51045054015).

The spelling of 21013023003 in words is "twenty-one billion, thirteen million, twenty-three thousand, three".