17421618803 has 2 divisors, whose sum is σ = 17421618804. Its totient is φ = 17421618802.

The previous prime is 17421618779. The next prime is 17421618821. The reversal of 17421618803 is 30881612471.

It is a strong prime.

It is an emirp because it is prime and its reverse (30881612471) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17421618803 - 2²² = 17417424499 is a prime.

It is not a weakly prime, because it can be changed into another prime (17421608803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8710809401 + 8710809402.

It is an arithmetic number, because the mean of its divisors is an integer number (8710809402).

Almost surely, 2^17421618803 is an apocalyptic number.

17421618803 is a deficient number, since it is larger than the sum of its proper divisors (1).

17421618803 is an equidigital number, since it uses as much as digits as its factorization.

17421618803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 41.

The spelling of 17421618803 in words is "seventeen billion, four hundred twenty-one million, six hundred eighteen thousand, eight hundred three".