21016404316 has 6 divisors (see below), whose sum is σ = 36778707560. Its totient is φ = 10508202156.

The previous prime is 21016404289. The next prime is 21016404323. The reversal of 21016404316 is 61340461012.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 2627050536 + ... + 2627050543.

Almost surely, 2^21016404316 is an apocalyptic number.

It is an amenable number.

21016404316 is a deficient number, since it is larger than the sum of its proper divisors (15762303244).

21016404316 is a wasteful number, since it uses less digits than its factorization.

21016404316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5254101083 (or 5254101081 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 21016404316 its reverse (61340461012), we get a palindrome (82356865328).

The spelling of 21016404316 in words is "twenty-one billion, sixteen million, four hundred four thousand, three hundred sixteen".