18480214261 has 2 divisors, whose sum is σ = 18480214262. Its totient is φ = 18480214260.

The previous prime is 18480214223. The next prime is 18480214279. The reversal of 18480214261 is 16241208481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17221312900 + 1258901361 = 131230^2 + 35481^2 .

It is a cyclic number.

It is not a de Polignac number, because 18480214261 - 2¹⁹ = 18479689973 is a prime.

It is a super-2 number, since 2×18480214261² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18480214261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18480214201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9240107130 + 9240107131.

It is an arithmetic number, because the mean of its divisors is an integer number (9240107131).

Almost surely, 2^18480214261 is an apocalyptic number.

It is an amenable number.

18480214261 is a deficient number, since it is larger than the sum of its proper divisors (1).

18480214261 is an equidigital number, since it uses as much as digits as its factorization.

18480214261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24576, while the sum is 37.

The spelling of 18480214261 in words is "eighteen billion, four hundred eighty million, two hundred fourteen thousand, two hundred sixty-one".