21296513767 has 2 divisors, whose sum is σ = 21296513768. Its totient is φ = 21296513766.

The previous prime is 21296513729. The next prime is 21296513779. The reversal of 21296513767 is 76731569212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21296513767 - 2¹⁹ = 21295989479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21296513767.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21296513467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10648256883 + 10648256884.

It is an arithmetic number, because the mean of its divisors is an integer number (10648256884).

Almost surely, 2^21296513767 is an apocalyptic number.

21296513767 is a deficient number, since it is larger than the sum of its proper divisors (1).

21296513767 is an equidigital number, since it uses as much as digits as its factorization.

21296513767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 49.

The spelling of 21296513767 in words is "twenty-one billion, two hundred ninety-six million, five hundred thirteen thousand, seven hundred sixty-seven".