17821480279 has 2 divisors, whose sum is σ = 17821480280. Its totient is φ = 17821480278.

The previous prime is 17821480231. The next prime is 17821480283. The reversal of 17821480279 is 97208412871.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 17821480279 - 2¹¹ = 17821478231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17821480679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8910740139 + 8910740140.

It is an arithmetic number, because the mean of its divisors is an integer number (8910740140).

Almost surely, 2^17821480279 is an apocalyptic number.

17821480279 is a deficient number, since it is larger than the sum of its proper divisors (1).

17821480279 is an equidigital number, since it uses as much as digits as its factorization.

17821480279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 49.

The spelling of 17821480279 in words is "seventeen billion, eight hundred twenty-one million, four hundred eighty thousand, two hundred seventy-nine".