21175072967 has 2 divisors, whose sum is σ = 21175072968. Its totient is φ = 21175072966.

The previous prime is 21175072957. The next prime is 21175072991. The reversal of 21175072967 is 76927057112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21175072967 - 2⁶ = 21175072903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21175072957) 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 as a sum of consecutive naturals, namely, 10587536483 + 10587536484.

It is an arithmetic number, because the mean of its divisors is an integer number (10587536484).

Almost surely, 2^21175072967 is an apocalyptic number.

21175072967 is a deficient number, since it is larger than the sum of its proper divisors (1).

21175072967 is an equidigital number, since it uses as much as digits as its factorization.

21175072967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 370440, while the sum is 47.

The spelling of 21175072967 in words is "twenty-one billion, one hundred seventy-five million, seventy-two thousand, nine hundred sixty-seven".