18196980479999 has 2 divisors, whose sum is σ = 18196980480000. Its totient is φ = 18196980479998.

The previous prime is 18196980479983. The next prime is 18196980480011. The reversal of 18196980479999 is 99997408969181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18196980479999 - 2⁴ = 18196980479983 is a prime.

It is a super-2 number, since 2×18196980479999² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18196980179999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9098490239999 + 9098490240000.

It is an arithmetic number, because the mean of its divisors is an integer number (9098490240000).

Almost surely, 2^{18196980479999} is an apocalyptic number.

18196980479999 is a deficient number, since it is larger than the sum of its proper divisors (1).

18196980479999 is an equidigital number, since it uses as much as digits as its factorization.

18196980479999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5714053632, while the sum is 89.

The spelling of 18196980479999 in words is "eighteen trillion, one hundred ninety-six billion, nine hundred eighty million, four hundred seventy-nine thousand, nine hundred ninety-nine".