21330366401 has 8 divisors (see below), whose sum is σ = 21898266624. Its totient is φ = 20767218880.

The previous prime is 21330366377. The next prime is 21330366403. The reversal of 21330366401 is 10466303312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21330366401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21330366403) 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, 1179080 + ... + 1197033.

It is an arithmetic number, because the mean of its divisors is an integer number (2737283328).

Almost surely, 2^21330366401 is an apocalyptic number.

It is an amenable number.

21330366401 is a deficient number, since it is larger than the sum of its proper divisors (567900223).

21330366401 is a wasteful number, since it uses less digits than its factorization.

21330366401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376351.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 21330366401 its reverse (10466303312), we get a palindrome (31796669713).

The spelling of 21330366401 in words is "twenty-one billion, three hundred thirty million, three hundred sixty-six thousand, four hundred one".