21043441414 has 4 divisors (see below), whose sum is σ = 31565162124. Its totient is φ = 10521720706.

The previous prime is 21043441411. The next prime is 21043441417. The reversal of 21043441414 is 41414434012.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21043441411) and next prime (21043441417).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21043441411) 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 as a sum of consecutive naturals, namely, 5260860352 + ... + 5260860355.

It is an arithmetic number, because the mean of its divisors is an integer number (7891290531).

Almost surely, 2^21043441414 is an apocalyptic number.

21043441414 is a deficient number, since it is larger than the sum of its proper divisors (10521720710).

21043441414 is a wasteful number, since it uses less digits than its factorization.

21043441414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10521720709.

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

Adding to 21043441414 its reverse (41414434012), we get a palindrome (62457875426).

The spelling of 21043441414 in words is "twenty-one billion, forty-three million, four hundred forty-one thousand, four hundred fourteen".