21014042013 has 24 divisors (see below), whose sum is σ = 31339992320. Its totient is φ = 13554319680.

The previous prime is 21014042003. The next prime is 21014042039. The reversal of 21014042013 is 31024041012.

It is not a de Polignac number, because 21014042013 - 2⁹ = 21014041501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014042003) 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 23 ways as a sum of consecutive naturals, for example, 2319270 + ... + 2328312.

Almost surely, 2^21014042013 is an apocalyptic number.

It is an amenable number.

21014042013 is a deficient number, since it is larger than the sum of its proper divisors (10325950307).

21014042013 is a wasteful number, since it uses less digits than its factorization.

21014042013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17409 (or 17406 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21014042013 its reverse (31024041012), we get a palindrome (52038083025).

The spelling of 21014042013 in words is "twenty-one billion, fourteen million, forty-two thousand, thirteen".