21114431404 has 24 divisors (see below), whose sum is σ = 40370407056. Its totient is φ = 9582936000.

The previous prime is 21114431333. The next prime is 21114431441. The reversal of 21114431404 is 40413441112.

It is a super-2 number, since 2×21114431404² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 333907 + ... + 392074.

It is an arithmetic number, because the mean of its divisors is an integer number (1682100294).

Almost surely, 2^21114431404 is an apocalyptic number.

It is an amenable number.

21114431404 is a deficient number, since it is larger than the sum of its proper divisors (19255975652).

21114431404 is a wasteful number, since it uses less digits than its factorization.

21114431404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726657 (or 726655 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21114431404 its reverse (40413441112), we get a palindrome (61527872516).

The spelling of 21114431404 in words is "twenty-one billion, one hundred fourteen million, four hundred thirty-one thousand, four hundred four".