21404404114 has 4 divisors (see below), whose sum is σ = 32106606174. Its totient is φ = 10702202056.

The previous prime is 21404404097. The next prime is 21404404123. The reversal of 21404404114 is 41140440412.

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

It can be written as a sum of positive squares in only one way, i.e., 20783547225 + 620856889 = 144165^2 + 24917^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5351101027 + ... + 5351101030.

Almost surely, 2^21404404114 is an apocalyptic number.

21404404114 is a deficient number, since it is larger than the sum of its proper divisors (10702202060).

21404404114 is a wasteful number, since it uses less digits than its factorization.

21404404114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10702202059.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 21404404114 its reverse (41140440412), we get a palindrome (62544844526).

The spelling of 21404404114 in words is "twenty-one billion, four hundred four million, four hundred four thousand, one hundred fourteen".