21361104616 has 32 divisors (see below), whose sum is σ = 42218928000. Its totient is φ = 10104293376.

The previous prime is 21361104613. The next prime is 21361104631. The reversal of 21361104616 is 61640116312.

It is not an unprimeable number, because it can be changed into a prime (21361104613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11560 + ... + 207016.

It is an arithmetic number, because the mean of its divisors is an integer number (1319341500).

Almost surely, 2^21361104616 is an apocalyptic number.

It is an amenable number.

21361104616 is a deficient number, since it is larger than the sum of its proper divisors (20857823384).

21361104616 is a wasteful number, since it uses less digits than its factorization.

21361104616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196201 (or 196197 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 21361104616 in words is "twenty-one billion, three hundred sixty-one million, one hundred four thousand, six hundred sixteen".