21115441414 has 16 divisors (see below), whose sum is σ = 32440834800. Its totient is φ = 10304721504.

The previous prime is 21115441409. The next prime is 21115441427. The reversal of 21115441414 is 41414451112.

It is a super-2 number, since 2×21115441414² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708229 + ... + 737440.

It is an arithmetic number, because the mean of its divisors is an integer number (2027552175).

Almost surely, 2^21115441414 is an apocalyptic number.

21115441414 is a deficient number, since it is larger than the sum of its proper divisors (11325393386).

21115441414 is a wasteful number, since it uses less digits than its factorization.

21115441414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445847.

The product of its digits is 2560, while the sum is 28.

Adding to 21115441414 its reverse (41414451112), we get a palindrome (62529892526).

The spelling of 21115441414 in words is "twenty-one billion, one hundred fifteen million, four hundred forty-one thousand, four hundred fourteen".