21467713291 has 2 divisors, whose sum is σ = 21467713292. Its totient is φ = 21467713290.

The previous prime is 21467713259. The next prime is 21467713313. The reversal of 21467713291 is 19231776412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21467713291 - 2⁵ = 21467713259 is a prime.

It is not a weakly prime, because it can be changed into another prime (21467713231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10733856645 + 10733856646.

It is an arithmetic number, because the mean of its divisors is an integer number (10733856646).

Almost surely, 2^21467713291 is an apocalyptic number.

21467713291 is a deficient number, since it is larger than the sum of its proper divisors (1).

21467713291 is an equidigital number, since it uses as much as digits as its factorization.

21467713291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 43.

The spelling of 21467713291 in words is "twenty-one billion, four hundred sixty-seven million, seven hundred thirteen thousand, two hundred ninety-one".