18386722050479 has 2 divisors, whose sum is σ = 18386722050480. Its totient is φ = 18386722050478.

The previous prime is 18386722050469. The next prime is 18386722050547. The reversal of 18386722050479 is 97405022768381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18386722050479 - 2¹² = 18386722046383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18386722050469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9193361025239 + 9193361025240.

It is an arithmetic number, because the mean of its divisors is an integer number (9193361025240).

It is a 1-persistent number, because it is pandigital, but 2⋅18386722050479 = 36773444100958 is not.

Almost surely, 2^{18386722050479} is an apocalyptic number.

18386722050479 is a deficient number, since it is larger than the sum of its proper divisors (1).

18386722050479 is an equidigital number, since it uses as much as digits as its factorization.

18386722050479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40642560, while the sum is 62.

The spelling of 18386722050479 in words is "eighteen trillion, three hundred eighty-six billion, seven hundred twenty-two million, fifty thousand, four hundred seventy-nine".