21014444413 has 8 divisors (see below), whose sum is σ = 22323071232. Its totient is φ = 19713871296.

The previous prime is 21014444401. The next prime is 21014444497. The reversal of 21014444413 is 31444441012.

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

It is a de Polignac number, because none of the positive numbers 2^k-21014444413 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 (21014444813) 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, 2008045 + ... + 2018482.

It is an arithmetic number, because the mean of its divisors is an integer number (2790383904).

Almost surely, 2^21014444413 is an apocalyptic number.

It is an amenable number.

21014444413 is a deficient number, since it is larger than the sum of its proper divisors (1308626819).

21014444413 is a wasteful number, since it uses less digits than its factorization.

21014444413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4026851.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 21014444413 its reverse (31444441012), we get a palindrome (52458885425).

The spelling of 21014444413 in words is "twenty-one billion, fourteen million, four hundred forty-four thousand, four hundred thirteen".