18280079663 has 2 divisors, whose sum is σ = 18280079664. Its totient is φ = 18280079662.

The previous prime is 18280079647. The next prime is 18280079669. The reversal of 18280079663 is 36697008281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18280079663 - 2⁴ = 18280079647 is a prime.

It is a super-2 number, since 2×18280079663² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18280079669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9140039831 + 9140039832.

It is an arithmetic number, because the mean of its divisors is an integer number (9140039832).

Almost surely, 2^18280079663 is an apocalyptic number.

18280079663 is a deficient number, since it is larger than the sum of its proper divisors (1).

18280079663 is an equidigital number, since it uses as much as digits as its factorization.

18280079663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 18280079663 in words is "eighteen billion, two hundred eighty million, seventy-nine thousand, six hundred sixty-three".