18201770479 has 2 divisors, whose sum is σ = 18201770480. Its totient is φ = 18201770478.

The previous prime is 18201770473. The next prime is 18201770501. The reversal of 18201770479 is 97407710281.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18201770479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18201770473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9100885239 + 9100885240.

It is an arithmetic number, because the mean of its divisors is an integer number (9100885240).

Almost surely, 2^18201770479 is an apocalyptic number.

18201770479 is a deficient number, since it is larger than the sum of its proper divisors (1).

18201770479 is an equidigital number, since it uses as much as digits as its factorization.

18201770479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 46.

The spelling of 18201770479 in words is "eighteen billion, two hundred one million, seven hundred seventy thousand, four hundred seventy-nine".