21339067297 has 4 divisors (see below), whose sum is σ = 21835324720. Its totient is φ = 20842809876.

The previous prime is 21339067271. The next prime is 21339067327. The reversal of 21339067297 is 79276093312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21339067297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21339067297.

It is not an unprimeable number, because it can be changed into a prime (21339067207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248128647 + ... + 248128732.

It is an arithmetic number, because the mean of its divisors is an integer number (5458831180).

Almost surely, 2^21339067297 is an apocalyptic number.

It is an amenable number.

21339067297 is a deficient number, since it is larger than the sum of its proper divisors (496257423).

21339067297 is an equidigital number, since it uses as much as digits as its factorization.

21339067297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496257422.

The product of its (nonzero) digits is 857304, while the sum is 49.

The spelling of 21339067297 in words is "twenty-one billion, three hundred thirty-nine million, sixty-seven thousand, two hundred ninety-seven".