21003443414 has 16 divisors (see below), whose sum is σ = 31559999328. Its totient is φ = 10483459392.

The previous prime is 21003443413. The next prime is 21003443473. The reversal of 21003443414 is 41434430012.

21003443414 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21003443414² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003443411) 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, 5573759 + ... + 5577525.

It is an arithmetic number, because the mean of its divisors is an integer number (1972499958).

Almost surely, 2^21003443414 is an apocalyptic number.

21003443414 is a deficient number, since it is larger than the sum of its proper divisors (10556555914).

21003443414 is a wasteful number, since it uses less digits than its factorization.

21003443414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7879.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21003443414 its reverse (41434430012), we get a palindrome (62437873426).

The spelling of 21003443414 in words is "twenty-one billion, three million, four hundred forty-three thousand, four hundred fourteen".