21467216464247 has 2 divisors, whose sum is σ = 21467216464248. Its totient is φ = 21467216464246.

The previous prime is 21467216464193. The next prime is 21467216464303. The reversal of 21467216464247 is 74246461276412.

It is an a-pointer prime, because the next prime (21467216464303) can be obtained adding 21467216464247 to its sum of digits (56).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21467216464247 - 2⁴⁰ = 20367704836471 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21467216464192 and 21467216464201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21467216464747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10733608232123 + 10733608232124.

It is an arithmetic number, because the mean of its divisors is an integer number (10733608232124).

Almost surely, 2^{21467216464247} is an apocalyptic number.

21467216464247 is a deficient number, since it is larger than the sum of its proper divisors (1).

21467216464247 is an equidigital number, since it uses as much as digits as its factorization.

21467216464247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21676032, while the sum is 56.

The spelling of 21467216464247 in words is "twenty-one trillion, four hundred sixty-seven billion, two hundred sixteen million, four hundred sixty-four thousand, two hundred forty-seven".