21323366697 has 16 divisors (see below), whose sum is σ = 28532995200. Its totient is φ = 14164697472.

The previous prime is 21323366693. The next prime is 21323366711. The reversal of 21323366697 is 79666332312.

It is not a de Polignac number, because 21323366697 - 2² = 21323366693 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21323366693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3946804 + ... + 3952202.

It is an arithmetic number, because the mean of its divisors is an integer number (1783312200).

Almost surely, 2^21323366697 is an apocalyptic number.

It is an amenable number.

21323366697 is a deficient number, since it is larger than the sum of its proper divisors (7209628503).

21323366697 is a wasteful number, since it uses less digits than its factorization.

21323366697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9872.

The product of its digits is 1469664, while the sum is 48.

The spelling of 21323366697 in words is "twenty-one billion, three hundred twenty-three million, three hundred sixty-six thousand, six hundred ninety-seven".