21414414434 has 24 divisors (see below), whose sum is σ = 38234951568. Its totient is φ = 8964171720.

The previous prime is 21414414421. The next prime is 21414414473. The reversal of 21414414434 is 43441441412.

It is a super-2 number, since 2×21414414434² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21414414434.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2536652 + ... + 2545079.

It is an arithmetic number, because the mean of its divisors is an integer number (1593122982).

Almost surely, 2^21414414434 is an apocalyptic number.

21414414434 is a deficient number, since it is larger than the sum of its proper divisors (16820537134).

21414414434 is a wasteful number, since it uses less digits than its factorization.

21414414434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5081790 (or 5081783 counting only the distinct ones).

The product of its digits is 24576, while the sum is 32.

Adding to 21414414434 its reverse (43441441412), we get a palindrome (64855855846).

The spelling of 21414414434 in words is "twenty-one billion, four hundred fourteen million, four hundred fourteen thousand, four hundred thirty-four".