21320602267 has 2 divisors, whose sum is σ = 21320602268. Its totient is φ = 21320602266.

The previous prime is 21320602243. The next prime is 21320602313. The reversal of 21320602267 is 76220602312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21320602267 is a prime.

It is not a weakly prime, because it can be changed into another prime (21320602217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660301133 + 10660301134.

It is an arithmetic number, because the mean of its divisors is an integer number (10660301134).

Almost surely, 2^21320602267 is an apocalyptic number.

21320602267 is a deficient number, since it is larger than the sum of its proper divisors (1).

21320602267 is an equidigital number, since it uses as much as digits as its factorization.

21320602267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

The spelling of 21320602267 in words is "twenty-one billion, three hundred twenty million, six hundred two thousand, two hundred sixty-seven".