21400311404 has 6 divisors (see below), whose sum is σ = 37450544964. Its totient is φ = 10700155700.

The previous prime is 21400311389. The next prime is 21400311481. The reversal of 21400311404 is 40411300412.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2675038922 + ... + 2675038929.

It is an arithmetic number, because the mean of its divisors is an integer number (6241757494).

Almost surely, 2^21400311404 is an apocalyptic number.

It is an amenable number.

21400311404 is a deficient number, since it is larger than the sum of its proper divisors (16050233560).

21400311404 is a wasteful number, since it uses less digits than its factorization.

21400311404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5350077855 (or 5350077853 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21400311404 its reverse (40411300412), we get a palindrome (61811611816).

The spelling of 21400311404 in words is "twenty-one billion, four hundred million, three hundred eleven thousand, four hundred four".